Cavitation - Thrusters & More

[@johnoberholtzer792]

1970s submariner turned pediatrician here. Great explanation of cavitation, Tim! Yes, we didn’t want to alert the soviets by increasing screw speed too rapidly. Turns out that knuckle cracking is cavitation of the synovial fluid in joints. Whenever a parent is worried about the kid doing this, I get to expound on ship propellers!

[@tinkmarshino]

John.. that was very interesting about knuckle cracking.. Thanks! # CUOTO

[@TimBatSea]

WOW! I had no idea. Thank you John!!! CUOTO

[@rixplace1374]

Its always a delight to step into the pilot house and see all that shiny and highly polished wood, VERY well cared for. The crew members obviously are proud of their ship and the responsibilty to their skipper. Would that sometimes my wood hobby shop would look as neat all the times.

[@TimBatSea]

Lol. Thank you for watching! CUOTO

[@geoffroberts4267]

People who are native English speakers are very fortunate, so I was pleased to hear you are going bilingual. Most people in Europe can speak English especially the Dutch a historical seafaring nation and also most Scandinavians. Europe has a vast inland waterways system capable of handling large towboats like in the Mississippi.. CUOTO

[@TimBatSea]

Thank you for watching Geoff. Yes, I have been putting up subtitles in 6 different languages (Dutch, Swedish, Norwegian, German, Spanish and Indonesian) for a while now. CUOTO

[@USMMCE]

I spent most of my working life on Sea Going Tugs of 6,000 hp and higher and I could tell when we got a Captain or Mate that started out of much smaller Tugs that had old Cats (398's-399's) or Detroits as they were usually a lot faster on the throttles. The term Throttle Jockey comes to mind. From watching your videos Capt, you do not fit into that category. On the bigger Tugs that are spinning Propellers that are 12 feet and bigger in diameter and you get a person in the Wheelhouse that likes to jam the throttles from ahead to astern quickly you know it real fast as they will shake your teeth out! As you stated, any Tug will shake whenever you are backing down or twisting. I've found that boats with Inboard turning wheels seem to cavitate a little more than outboard turning wheels. Thanks again for the videos and please keep them coming. Also, you are doing a great job of explaining what working and living on a Tug is like!

[@TimBatSea]

Thank you so much for this comment. I love my audience but at times I wish I had more fellow mariners chiming in on here. I really appreciate that you watch and please bring your knowledge and experience to the comments when ever you see fit. Be safe my brother. CUOTO

[@MrCatcracker]

The best description of cavitation ever Tim. Vibration isn't always a mechanical problem. In some cases, during pump vibration analysis, I have seen cavitation mimic a mechanical bearing issue exactly the same way.

[@TimBatSea]

Very cool Barry. Thank you for watching. CUOTO

[@mikeryan1832]

Tim Great explanation on cavitation. Tugs aren't the only boats that shake & shudder due to cavitation. I run a SeaRay EC390, which has straight props in tunnels. This setup works great in forward, but reverse the props, while the boat is moving forward, and she shakes. Add throttle to that mix & hang on, the boat shakes, shudders, and makes a lot of noise. Nature of the beast. Mike CUonT1

[@TimBatSea]

Thank you for watching Mike. CUOTO

[@combatrock3069]

Great watch. I’ve never been as interested as in tugs since i was a kid. From providence so not many opportunities to see one in action but the curious mind is still there and as a father of a 3 and 5 I find showing these vids to the kids, albeit in small clips as they are not really interested in the big picture, they find the boats interesting. Thank you for broadening my mind and educating me.

[@TimBatSea]

Thank you very much for watching. Providence Steam used to have some really pretty tugs. Now another company is there under the 195 bridge. CUOTO

[@winky32174]

This was not a silly, little video. It was very enlightening, in so many ways. Thanks again for your wonderful videos!

[@TimBatSea]

Thank you very much for saying that. CUOTO

[@richardjohnson9199]

Learned recently that you grew up on Monhegan Island. Would not have guessed that because most of your videos are in large ports further south. And no noticeable Maine accent. I was not born in Maine but have lived there for over 40 years, and have taken many trips from New Harbor by boat to Monhegan.. Often in early October when the lobster season starts there. Thanks, and now I know CUOTO.

[@TimBatSea]

Lol. Well we only moved out there when I was a few months old and I moved to Rhode after college. But if all goes well, I will be back there in my new sailboat in a week or two. Thank you for watching Richard. CUOTO

[@randallkaplan6425]

great explanation of the shake rattle and roll. three pieces of trivia, the rudders on the navy ffg's that we built in bath were off center of the rudders and that allowed the ship to turn faster one way verses the other for some defensive avoidance maneuver. they also had a system that blew compressed air around the hull and props and that coated the surfaces with bubbles to insulate the natural vibrations from the water to avoid detection from subs and other enemy's. last we were in belfast me. and the front street ship yard had some mega yacht up on blocks and it had a thruster on both ends of the boat along with twin screws. how odd and expensive! I wana be a patron too. best thing on youtube.

[@TimBatSea]

Welcome aboard Randall. Great info! I didn't know BIW offset rudders for better turning. Very cool. On most tugs the Rudders are usual dead center with a hole so the shaft can be removed, or they are off set without a hole so the shaft can be slid out. I have been the belfast many times (ex-wife was from there). The front street shipyard has really grown over the years. And the more money you have to put until a pleasure boat, the less skilled someone has to be running it. Lol. (There is a bow and stern thruster control system that does all the geometry for you. You just point where you want to go and it does all the work). Thank you very much for watching and wanting to become a Patron! I really appreciate it! Make sure to use your patron code if you buy any merch to get a discount. CUOTO

[@Glide1992]

Thanks for explaining cavitation. Explains why things shake rattle and roll sometimes. But the bubbles! Never knew that before. CUOTO

[@TimBatSea]

Thank you for watching. CUOTO

[@captainrick9379]

I thought Reggie was your bow thruster? 😏👍 #CUOTO! I love it! ❤⚓

[@TimBatSea]

LOL. He is the man!! CUOTO

[@davidrobb4077]

Hey, Cap: Just caught this video. Excellent tutorial on cavitation. Always a difficult topic to explain to the uninitiated. I have done my share of teaching and enjoy it particularly when the student finally gets it. Everyone learns differently and that's the challenge. Anyway, nice job. Oh, regarding your "boring" videos. There aren't any for me. I learn something with every one. For example, I've never driven a boat without a wheel and I have never worked in a harbor with traffic control. Other times, I just like taking a ride. Its all about being on the water. After all, its why we do it, right. Cuoto. -Capt. David Robb

[@TimBatSea]

Thank you very much David. I really appreciate it. CUOTO

[@davesawyer497]

Hi Tim, a lot of information there and thanks for explaining cavitation. One thing I did wonder about was that you presented a video of over 25 minutes and your boat is not working on something. I had reasoned that if you have a dual crewed boat then it must be very busy. Clearly you had a quiet shift that evening. I am renovating a small power boat, which I am to get in the water around Southampton in the UK, probably next year. A very busy piece of water and thanks to watching your videos I will have a closer look at the Tugs that work those waters, once I get out there! Many thanks and #CUOTO.

[@TimBatSea]

Thank you for watching Dave. So that particular night we were working. There was a gale bowing and raining and we had orders to remain with the barge as it was pumping off to the ship. (Look out the windows and you will see) We we getting bounced around a bit while tide up along side the barge and that is one reason you so much camera movement. You may also hear in the background the lines creaking. CUOTO

[@edwinfranco8683]

I have been watching your videos and as a Panamanian deck officer it is very interesting this kind of content and more important the smooth way you explain the practical and theorist part of this wonderful job. I have been in the US East coast for a couple of contracts (philadelphia, Savannah, Norfolk, Miami) but never at New York, I hope some day I have the chance to meet you in a bunkering operation and say Hi to you. Your are a great mentor for all of us the young officers like me out there. Thanks for the videos Cap. #CUOTO

[@TimBatSea]

Edwin! That makes me so happy! Thank you so much for commenting. It really means a great deal to me when other fellow mariners watch and enjoy the content I put out. Y tambien, Feliz dia de los Reyes! CUOTO

[@edwinfranco8683]

Thanks for your replying Cap. Feliz día de reyes.

[@margejones1154]

Just watched this one. I supper enjoy hearing you talk and seeing what you do. Always something new to see. I enjoy my travels on KZbin as I sit in my room crocheting away in the mountains of Oregon. Never been to that part of the state's so in is interesting to see the points of interest that you point out and I look up on a map to see where you are at. Keep up your channel. #cuoto

[@TimBatSea]

Thank you very much for watching Marge. CUOTO

[@ILoveTeamStripes]

Thank you. I thought CUOTO was your nickname or something.😁 The only vessel I've spent time on was a cruise ship. They shake and rattle when pulling away from port. I was told it was the thrusters. Also out here on the west coast in NorCal, I took a small boat out in Monterey to find whales. Small boats don't rattle or shake at all. Thanks again for the education.

[@TimBatSea]

Thank you very much for watching Rosemarie. CUOTO

[@dabuya]

As a person who sails regularly on cruise ships, I always wondered about the cavitation while maneuvering on the dock. Thank you for your explanation, much appreciated. Now I can sound intelligent explaining the phenomenon. #CUOTO

[@TimBatSea]

That's great Rev. CUOTO

[@davidfink4270]

I worked in the process control industry for a long time and explaining cavitation in a pressure vessel enviornment is much more straight forward than in marine situations. There is a lot of material available to explain the physics of vapor pressure and fluid flow which may help viewers to better understand the phenomenon of cavitation. CUOTO.

[@TimBatSea]

Thank you for watching David. Good stuff. CUOTO

[@kennethgoetz4500]

Thanks for another great video....as a new subscriber and a HUGE maritime fan.. especially Tugs. When I found your KZbin video series I have been extremely hooked on them and again I thank you for all of your efforts !!👍 My only problem that I have is that I haven’t found a Tug Video “support group” to help me manage my new found addiction here...?! Ken... cuoto

[@TimBatSea]

Lol. Thank you for watching Kenneth. CUOTO

[@masonjones3780]

Always love your videos. Living along the East river I always see tugs from your company go by.

[@TimBatSea]

Thank you for watching Mason. CUOTO

[@saabjunkieSPG]

Another great video. I installed class B AIS on my boat after watching your AIS video. Now it’s easier to call you commercial guys. They see where I am on AIS and we figure out a plan. CUOTO

[@TimBatSea]

Thank you very much Eric!! It cost money, but it's worth it to stay alive and when you think about the money you spend to enjoy your time on the water coupled with the level of comfort and reduced stress from and active AIS, I think the purchase price is worth it. CUOTO

[@adrinaik93]

New subscriber here, Tim! Aviation enthusiast, but also, I love all sorts of big machinery in action. Fan of these beast boats! #CUOTO

[@TimBatSea]

Thank you for watching and Subscribing Adrian. Welcome to the channel. CUOTO

[@vburke1]

Excellent lesson on cavitation, Cap'n, thank you!

[@TimBatSea]

Thank you Vern. CUOTO

[@edwardmounsey9208]

Thank you for posting this informative video. I always learn something from your videos. Edward

[@TimBatSea]

Thank you Edward. CUOTO

[@lancecluster]

Nice video, you actually directed me here and I am glad you did. It did answer my question.

[@TimBatSea]

Oh cool! Thank you Lance. CUOTO

[@trcxsa]

Great video as always! Pretty sure tug props are designed to be thicker to cope with cavitation. i think most of the vibration may actually come from prop vortices and re-circulation through the props and not just cavitation. It happens on helicopters too where at low air speeds, high decent rates with high power settings (Similar to what your props would experience) the air will recirculate through the rotor disk and cause a loss of lift and a bunch of vibration, it can get to the point where you actually start recirculating so much through that the lift drops off sharply and causes you to start falling out the sky ( the way to recover is to lower power setting and move forward into clean air) . Water and air both being fluids makes me wonder if you don't experience the same thing, I cant see cavitation causing a ton of vibration really as the bubbles are small, you would need to have most of the prop blade in cavitation for that to be a factor I think. A prop with that bad cavitation on it wouldn't perform much useful work at all. This is all just a theory tho. I come from the helicopter world so dont know much about all things nautical. Interested to know your thoughts on this theory #CUOTO

[@TimBatSea]

Thank you for watching. So yes, I am familiar with the phenomenon, and it does happen to us, but I believe it is a different thing we are experiencing. When operating in shoal water, we have to go all stop at times to let everything settle down. After awhile our wheels just are eating their own wash and thrust is lost just as a helicopter will loose lift. But that happens with little to no shaking or vibration for us. So that is why I think it may be different. CUOTO

[@trcxsa]

@@TimBatSea Aah ok, interisting!

[@glennlepien473]

See you On The One, Capt ..

[@TimBatSea]

Thank you for watching Glenn! CUOTO

[@moore4807]

Thumbs up as usual Us dorks appreciate you and your teachings :)

[@TimBatSea]

Thank you very much. CUOTO

[@michael7423]

My thumb goes up as soon as I get any notifications from captain Tim because it’s always great content! Happy holidays everyone, stay safe😷 COUTO!

[@michael7423]

Are those white wheels above your head to direct the searchlights?

[@TimBatSea]

@@michael7423 Yes they are.

[@frankd7465]

Really enjoyed learning about what causes the Cavitation. Another great video Tim. Keep them coming. CUOTO

[@TimBatSea]

Thank you for watching Frank and please consider subscribing. CUOTO

[@zpilotplane358]

I got no clue how I ended up on this side of KZbin... but I like it. Keep up the great work Tim!

[@TimBatSea]

Thank you very much for watching!

[@paulbearman4653]

Look forward to seeing the 360 camera in action. When I have been on a cruise ship it’s always interesting watching them manoeuvre using their bow thrusters. In the UK I have a canal narrowboat with a bow thruster, it is viewed as cheating but I like being able to do tight turns.

[@paulbearman4653]

CUOTO

[@TimBatSea]

Thank you for watching Paul. I am a fan of the channel, Cruising the cut. I would love to get over to see a few. It's not cheating. You are being respectful of not wanting to hit their boats!!! LOL

[@James-seafan]

excellent video nice views and commentary thank you danny and tim

[@TimBatSea]

Thank you for watching James. CUOTO

[@milantoombs6696]

Hi Tim, loved the explanation of cavitation. CUOTO!

[@TimBatSea]

Thank you for watching Milan. Please consider Subscribing if you haven't already. I try to post new content every Tuesday. CUOTO

[@FetKiller]

Thanks Tim for all the great videos!!

[@TimBatSea]

Thank you very much for watching. CUOTO

[@andrewleatherman4931]

Excellent video and you really are a great teacher! CUOTO!

[@TimBatSea]

Thank you very much Andrew. CUOTO

[@joshuadupay1285]

Great commentary Tim! I am a Naval Architecture/ Marine Engineering student, and I can say that besides cost, the area of operation/ tug mission is a major factor when it comes to things like thrusters. I would think that a reason for many tugs in Europe having thrusters would be the size of ports. I believe that European ports are on average much narrower than US ports meaning that they need more maneuvering capability. Another thing is just as you said, it depends entirely on the requirements of a company and how many boats they have running in a certain area. A final thing is that depending on the port there is an issue with debris in the water. Many US ports are based on rivers which have debris in them which can easily be sucked up in a thruster, which is also why in the US we don't see many of the fancy propulsion methods like Voith-Schneider propellers. Let me know your thoughts on this. #CUOTO

[@TimBatSea]

Out Friggin Standing Joshua! I am with you 100 percent. Thank you brother. CUOTO

[@desertbrewcrew1974]

When my brother first joined the contractor at Pearl Harbor (for maint. and repairs on nuclear subs), part of his job was to cover the prop while it was coming to dry dock to hide it from spy satellites because they make little to no cavitation unless its going full tilt from a dead stop or full reverse.

[@TimBatSea]

True! Very cool. Thank you for watching. CUOTO

[@jimt2853]

Another great video! Cavitation on small craft props will cause damage to the alloys used. Easy fix to change to another pitch that fits your usage, not an expensive item. A prop that is on your vessel can cost a few thousand plus, so live with it as it works giving you the speed and power for your application. Can't wait to see the 360, and a trip to Bridgeport Harbor. CUOTO..

[@TimBatSea]

Thank you very much Jim. CUOTO

[@erich9244]

Tim -Thanks for the discussion on cavitation! I learned stuff I never knew :) Keep on tugging captain and I'll keep on watching! God Bless and safe travels.

[@TimBatSea]

Thank you very much Eric. (Is that a Frenchie? I miss my dog so much) CUOTO

[@erich9244]

@@TimBatSea Yes it is my dream to own one of them I cannot now as my two cats take priority but when I retire I will get one. I fell in love with the breed almost 20 years ago a dearly wish I owned one.

[@TimBatSea]

@@erich9244 I've had my share of dogs, and Bosco was the best. CUOTO

[@heinzdoerbaum2987]

Hi Tim, I ended up on this channel by chance and am pleasantly surprised at how similar so many things are in shipping. I was self-employed on a cargo ship and a passenger ship for 35 years, mainly on the Rhine and although I have never been to the USA, the way you work on board, the attitude towards life and the love for your job seems very familiar to me. Great videos, the ones I've seen so far, respect for your efforts! Best regards, Heinz and #CUOTO

[@TimBatSea]

Thank you very much for writing that Heinz. It really means a lot to me. We are all brother mariners born of the same mother ocean. Be safe! CUOTO

[@ErrorNotFound-kj1gz]

Just found your channel and love your content. You earned yourself a like and a brand new sub

[@TimBatSea]

Thank you for watching and subscribing. Please forgive me for the late response. I think YT flagged it and I didn't see it until I went to clean out the flagged folder. CUOTO

[@deanraf]

Thanks for explaining #CUOTO. I have many years of education (which is probably the problem) and I can't tell you the years it took me to figure out "see on the one's or the two's". It lead to a few uncomfortable moments while out on the rivers and canals. BTW, I love my bow thruster but use it as little as possible. Since I only have one screw it make steering when backing possible, and also when moving forward without power it allows me to point the bow one direction or another. Helpful when moving slow like coming into a lock. Hope you get to Europe...#CUOTO

[@TimBatSea]

Thank you Dean. Me Too! I will need people to weigh in with their locations to set up a few meet ups! CUOTO

[@chuckels431]

great video as usual capt 👍.. cuoto.

[@TimBatSea]

Thank you! CUOTO

[@ClassXIRoads]

I am slowly catching up soon to be waiting on your videos to come out , you do a great job explaining things and are easy to listen to, maybe you could give us a quick video on your camera gear from your beginning to where your at now ,, what editing software your using, audio, the 360 stuff is wicked cool but I have no clue how your filming it....thanks Jim...CUOTO

[@TimBatSea]

Good idea James. Thank you. CUOTO

[@RagtimeBillyPeaches]

CUOTO, AND KEEP UP THE GOOD WORK. I've been in boats since i was 12, and have been dodging tugs forever. They've got a serious bow wave.

[@TimBatSea]

CUOTO

[@actemple3282]

super cool I love the info thanks for sharing ...I want a bow thuster it would make puting trailers in some places a lot easier ....cavitation ...is normal with in all the boats and ships i have been on ..

[@TimBatSea]

Thank you for watching Adam. CUOTO

[@daebi37]

Absolutely enjoy your video's Tim. Thank you for taking the time to make them! CUOTO.

[@TimBatSea]

Thank you for watching! CUOTO

[@stephenstange4194]

Looking forward to 360 video! Thanks for the hard work putting all of this together! #CUOTO

[@TimBatSea]

Thank you for watching Stephen. CUOTO

[@FloridaJack]

Thanks for the cavitation explanation. Had wondered about the vibration. CUOTO.

[@TimBatSea]

Thank you Jack. CUOTO

[@josephmugiver4692]

#cuoto😀 I have wondered what that meant since I first subscribed to you! I even googled it trying to find the meaning! Love your channel and how your always working to improve it. Good stuff Captain, thanks for sharing.

[@TimBatSea]

Sorry for the delay in getting back to you Joseph. It is our channel's secret code. LOL I'll "See you on the one" as in a one whistle or port to port pass. CUOTO

[@eddieweigel9490]

That happened to my buddy’s boat Captain the bubbles collapsed and actually ate into the props that’s amazing how that takes place happens also with pump impellers for coolant and things like heavy fuel oil

[@TimBatSea]

Yes. Agreed. CUOTO

[@TheByard]

Hi Tim. Thanks for that. 1, When I had my boat scaping her bottom and slapping some make up on. I got to talking to a fellow boater and took a look at his handy work. I noticed pitting on his props and he said it was due to cavitation over the years, he was waiting for new props to arrive. A a friend of mine bought an ex pilot boat and said part of the original order spec would be that the boat was capable of going from full ahead to full reverse in a straight pull of the twin leavers. This he explained was difficult because of prop slip and cavitation, so the props had to be a set distance apart. This guy had a full masters ticket so I presume he was right. 2, I kept my boat in the Netherlands for 3 years housed in a climate controlled shed over the winter. A quick lick of paint and varnish then off touring the rivers, canals and lakes attending classic boat rallies. I cannot remember seeing a tug and barge set up like yours doing bunkering duties, those I noticed were self propelled units around Rotterdam and Amsterdam. These units were fast and whistled past me while I was at 10 knots. The transport barges are huge affairs, check out ShipSpottingNetherlands this guy films canal craft entering locks and clearing bridges with lots of the captains giving him a horn blast. He also films boat launches and tows. He filmed a Ship with ELKE in the name. You will notice single screw with bow thruster on all the boats. The captain and family live aboard with the family car and sport boat on deck. 3. In the UK SWAG means a thief's stolen goods, cartoons will show a swag bag over the shoulder. 4 . I had thought of inviting you over and was going to talk to my captain about it this year, but Covid had my air ticket cancelled and the ADLS return trip to Dunkirk also cancelled. This is held every 5 years so don't know what the future plans are for next year. The 4 inter years RETURNS are held at British ports that were used in the 1940 evacuation. His boat White Marling was built by Thorneycroft for a private owner, the company built Motor Torpedo Boat for the navy and WM was built on the same hull design. Do look her up at ADLS.co.uk We were also going to attend the Oostende at Ankor classic boat rally the following week. So 4 cross channel trips and galleons of diesel. He likes me onboard as I'm retired and don't have to get in time for work, if the weather turns nasty. I'm quite happy supping beer in a bar or onboard.

[@TimBatSea]

Thank you for watching! And yes!!! By all means!! When borders open and flights return, I am coming over. CUOTO

[@bjrntveter2847]

Another great video! Also it was cool to see that you have a Danish native introducing that you have Norwegian subtitles. 😊

[@TimBatSea]

Thank you for watching Bjorn. Yes, is adorable. I don't know her, but am very grateful for the introduction I am still looking for introductions in german and indonesian. CUOTO

[@johnmcgovern3806]

I think vibration at full throttle low speed is more to do with turbulence. Sure there will be cavitation but it will be like fine rain and largely little energy in it. The turbulence is the water being beaten up by the prop with nowhere to go so it come back on the prop in a raged flow. The prop is skidding and until there is water flow past the hull turbulence will be produced with sufficient power input. Props are designed to to work best at a certain flow past them.

[@TimBatSea]

Very true John. Thank you for watching.

[@jimh1369]

Thanks for the big boat explanation of cavitation. In smaller boats, cavitation was also referred to as prop slip when rapidly changing direction of the prop. We learned to pause between FWD and REV as to allow the bubbles to dissipate, and the water movement to slow so as not to shock the driveline and lower unit as much. Keep up the great work, and I'm looking forward to the 360° video next week. #CUOTO

[@TimBatSea]

Thank you for watching Jim. Your clutch dog will appreciate your pause. CUOTO

[@ThumperKJFK]

Great presentation Tim. CUOTO is something that I have taken notice to from way way back as a kid with all my ham radio gear tuned to the maritime channels, both VHF, and the old HF and always would wonder what CUOTO was all about. Yep thanks to google look up I now know what on 2, and on 1 means. Including way back than while sitting on the dock in Long Island City why whistles were always giving a, Toot toot, or a toot, and all the other signals. So thanks again for the explanation. Oh yeh, back in college I did learn what cavitation is in a physics course, how to mitigate it in building screws for submarines and other very large ships, pitting on the blade caused by cavitation. And yes the course was all about Pressure and fluids, not ships and screws, LOL #CUOTO

[@TimBatSea]

Thank you for watching Gregory! CUOTO

[@fisherdigital]

Tim love the videos; I was wondering if you could speak to the two spheres that are off to the sides of your magnetic compass?

[@TimBatSea]

LOL. You are the 2nd person to ask about them today. Thank you for watching. Those are iron adjustable balls to help calibrate the compass by offsetting the tug's magnetic field that would other wise fool the compass. CUOTO

[@rogerdeves1511]

Hi Tim again great information I had a mate whose boat capitated due to the props being too close to the surface, hence it would pull air vortices. I did not know about the steam effect .No sweat regards new technology mate none of us are getting any younger we can teach the youngsters a thing or two.....you'll get it. Sounds like fun. Also CUOTO is cool mate I like it. Ingat kuya CUOTO

[@TimBatSea]

Thank you for watching Roger. CUOTO

[@brianpowell3993]

Love waking up in the middle of the night to see the new video. I did wonder about the shake, even my 22 fy IO Boat shakes is i hard reverse. Great information! CUOTO

[@TimBatSea]

CUOTO

[@kc2dhu]

CUOTO! Great job Tim. BTW good luck with the 360.

[@TimBatSea]

Thank you very much Jim. CUOTO

[@vincentdaniel4617]

Loved the video, but... it brought up an unrelated question. You mentioned the US requirement for redundant systems while moving heavy/haz-mat. When you are lashed to a notched stern barge are you able to drop the anchor if you have an emergency? Along that same line, are you even able to drop the hook if you have an engineering failure (no electricity, compressed air, hydraulic pressure). Thanks, Dan

[@vincentdaniel4617]

OK Tim lol, CYOTO (or 2)

[@TimBatSea]

Thank you for watching Vincent. Yes. The barges have massive Anchors and ground tackle. So in an emergency or catastrophic engineering failure, the barge being a separate unit would still be able to drop the it's anchor. (The tug has an anchor for it's self, but it's not nearly big enough for the barge.) CUOTO

[@Subielicious22]

I’m not a Maritime Professional, but I did stay in a Holiday Inn Express last night, so I’m going to offer you some gratuitous advice.... 😂😂 Reminds me of my years flying the Line in the passenger world.... so glad to be in cargo!! 😂😂 #CUOTO!!!

[@TimBatSea]

LOL. You are the man Ian. CUOTO

[@k1hasard]

The section on cavitation was very interesting to me and easy to understand for someone who isn't a water guy and it made a lot of sense to me. I wasn't thinking about anything being out of balance or bearings being shot because you seem not to be concerned at all with that vibration. I had an idea it had to do with the horsepower involved and the forces from the propellers. Now I know what's going on, it's good to learn something new every day. #CUOTO

[@TimBatSea]

Thank you Ken! CUOTO

[@MrCobb-rq8iv]

My question is, and it was explained, why has science and technology performed a universal direction wheel that is efficient to not cavitation? It still seems to me at the point of cavitation where steam is produced you have lost a firm grip on the water. Am I wrong? I realize if you have the enough power to crank it fast enough to boil it can be done. Thinking outside the box inquiring minds want to know why it has not been solved. cuoto

[@ROetjel]

Hey Tim. On the pushboat i work with 3 engines it alsof radles en shakes when we put two in reverse and one forward. Our barges we have rudders om the front of the barges. We have 6 barges . Thx for the video's

[@TimBatSea]

Thank you for watching. That's cool. I have never run a triple before or ever seen a barge with ruders on the front. Cool stuff. Thank you. CUOTO

[@jamesterrill1938]

As a landlocked fan, I being in Oklahoma always enjoy your videos...

[@TimBatSea]

Funny. As the channel's audience grows, I find myself liking the other Mariners on here as well as the recreational boats. But I get so happy when I get a comment from a "landlocked fan". That is so cool that you fine the channel interesting. CUOTO

[@climenuts]

Hey Tim! My sailboat with its 13hp diesel and 14" prop cavitate on a hard stop. Even the sounder stops working when I keep it pulling for an anchor set. Nothing as violent as your 3,000hp bottom cleaning service though! CUOTO!

[@TimBatSea]

Lol. Oh yes! Thank you for watching Matthew. CUOTO

[@brianwright3650]

Another great video Tim looking forward to the 360 view...it would be more effective if the bow thrusters were actually in the barges bow...CUOTO

[@TimBatSea]

Thank you for watching Brian. That is where they are put on the barges that have bow thrusters. CUOTO

[@mustralineabsorbine5082]

Great explanation on cavitation. CUOTO!!

[@TimBatSea]

Thank you very much. CUOTO

[@deividrivera9537]

Hi cap.🚢 Tim can you make a video tutorial on basic tug handling and manouvering 🙏🏾. please.

[@TimBatSea]

Thank you for watching Deivid. Did you see the videos I did with the paper cut outs? You might like them. CUOTO

[@deividrivera9537]

@@TimBatSea no i have not cap. Whats the name of the video

[@TimBatSea]

@@deividrivera9537 The last one was something like "mid summer docking refresher"

[@brianlwhitney54]

Thanks for the great video, looking forward to the 360 video. Be safe, stay healthy #cuoto

[@TimBatSea]

Thank you Brian. CUOTO

[@tinkmarshino]

Tell your kid even dorks need to have fun!!! I never knew that the water turns to steam.. that was real interesting... But what is the ONE.. you explained to me about the cuoto before this but I never really knew what the one was.. At any rate # CUOTO my brother.. carry on!

[@TimBatSea]

See you on the one is short for saying "I will see you on a one whistle pass, port to port" CUOTO

[@tinkmarshino]

@@TimBatSea AH! very good... now I am finally a hipster! I have waited 68 years to get there.. now I are one.. which in turn leaves me with CUOTO.. oh I just crack myself up sometimes! I am so funny.. huh? carry on my brother!

[@matt_waddy]

An aviation channel I watch tried the 360 cockpit videos. It's something people either passionately love or passionately hate. I personally am not a fan. I prefer the multiple camera angles that he did prior and you do currently, and he has since abandoned the 360 in favor of the old multiple camera angles too. I just feel like it's easier to see, in your case, what your hands are doing and the immediate response out the window without having to pan back and forth. Side note: What are the round, white things on the ceiling behind you? I assume they're just handholds for rough seas? #cuoto

[@TimBatSea]

Thank you for watching Matt. Yes, I think I too am starting to feel the same way. One solution I am thinking of in the future is to shoot my regular 3 camera flat video and upload a second video in 360 for those than want to see it. I don't know if it will be worth the effort as they take a bunch more work to get to post. Those white circular things are the vertical and horizontal controls for our searchlights. CUOTO

[@lolanatasha]

Capt Tim, can you talk about navigational light configuration for tugs and while towing? Thank you Capt Tim

[@TimBatSea]

Great idea Mark. I'm on it!! CUOTO

[@lolanatasha]

@@TimBatSea Thank you much Capt I appreciate that CUOTO

[@luscombe334]

Hey Tim, really appreciate your videos. You have inspired me to pursue a career at sea in the near future. CUOTO!

[@TimBatSea]

That is so cool and makes me so happy. First bit of advise (and probably the most important thing) keep your mouth shut and you eyes and ears open. No one likes the new guy trying to fit in telling stories. You have to earn your stripe first. Best of luck to you and please keep us informed on your progress. CUOTO

[@dennisjay3277]

Great video. Upper and lower houses. Do the throttle paddles move in both houses when you are maneuvering or do you switch off the other house? I guess my question is, do you isolate the lower house when you are in the lower house and then the same when you are in the upper? CUOTO

[@TimBatSea]

Thank you for watching Dennis. We use digital throttle controls and you can switch to any station you want locally. CUOTO

[@TheLookOf]

There are a lot of things landdwellers do not get. Lol. I have been asked many times, if we keep on sailing during the night, when crossing the North Sea to England, where we stay, or what we do. Usualy I answer: we booked a hotel for the night...😂🤣. I sleep so well on ships, even if it is next to the engine; but of course a small engine. And no cavitation. When covid is over, please do visit The Netherlands! CUOTO!!

[@TimBatSea]

Thank you for watching! And yes! I do want to come and you guys! CUOTO

[@marcOSSNL]

I think the main reason why so many 'barges' over here in Europe (or at least in the port of Rotterdam, in my country) have bow thrusters, is in the fact that they are just regular inland freighters instead of the push barges you have over there. Being an inland freighter, mostly operated by relatively small companies or just a single owner, you would have to rely on external assistance in maneuvering. We do have harbor tugs but I guess not as many as you have over there, as they are mostly involved in assisting large incoming vessels. We do have push barges but they are mostly used in long haul transport on rivers. Just not for bunkering purposes. Like I said, that's being done by regular inland freighters (you know, where the wheelhouse, apartment and cargo are all in one vessel). #CUOTO

[@TimBatSea]

WOW. Very cool Marc. Thank you for the info. I really appreciate it. I hope to get over to see you guys in the future. CUOTO

[@jamesmartin3895]

Cruise ships have bow trusters and use them all the time at every port of call seen it at Port Everglades , parallel parked between two other ships

[@TimBatSea]

Yes and did you know why? Because they are white and they would get scuffed up with black skid marks if assisted by tugs. CUOTO

[@captainkenny6092]

Hi Tim, I've been subscribed for a while now and I've been looking at all your videos! Its awesome work, keep it up! The vibrations you are talking about is true about how it work, I used to captain self propelled barges and tugboats and it has nothing to do with a bad cutless bearing or engine alignment. When we go hard astern the vessel vibrates like a God dam jackhammer. Lol #cuoto

[@TimBatSea]

Very True! Thank you for watching Kenny. CUOTO

[@captainkenny6092]

@@TimBatSea you're welcome buddy!

[@randyclyde4939]

Captain, a great explanation of cavitation! The best I've ever heard! Boiling water?!?! I would've never guessed! Anyway, you also answered something I've started to ask, but didn't. #CUOTO! Thanks for another great video! Gee, I feel like I now have the secret handshake! #CUOTO

[@TimBatSea]

Yay! I love it when people figure it out on their own. Welcome to the secret club. CUOTO

[@mattguldjord1357]

Hey Tim! Great video and explanations. Looking forward to seeing your videos showing some fall and winter maneuvering. Also, in my life "Dork" has become a term of endearment. My wife calls me a dork from time to time. Will you do another live stream? I missed the last one. Looking forward to your next video! CUOTO!

[@TimBatSea]

Lol. That's great! Yes. Let's do that soon. Good idea. CUOTO

[@waynecompton7612]

Good evening Captain Tim , thank you for explaining certain issues! Sorry for being so slow? Now I know #CUOTO !! Take care and stay safe?? #CUOTO out. 👍😎🇬🇧.

[@TimBatSea]

Good morning Wayne. CUOTO

[@carlthor91]

Tim, some of the Large ferries I have been on, when taking off, from the pier, the azimuthing drives would cavitate so much you figured they had lost a blade. Best wishes

[@TimBatSea]

Are you sure that isn't a thruster? They shake the boat really badly too. CUOTO

[@johnobiro5202]

Another Great one Tim. CUOTO.

[@TimBatSea]

Thank you John! CUOTO

[@donnieporter7890]

"CUOTO" this is a great vid finally get to see the man with the great voice.. the wood inside the tug is awsome really nice.. CUOTO WHAT A NICKNAME TAKE CARE MY FRIEND

[@TimBatSea]

Thank you very much Donnie. CUOTO

[@nialloconnell5895]

Great video Tim, can't wait to see the 360 version...... #CUOTO

[@TimBatSea]

Thank you for watching Niall. CUOTO

[@peterihre9373]

From Sweden 🇸🇪😁 Love your videos! Impressive how you handel the boat👍👍. Also impressive how much patience you show with people that by just watching your videos can tell you whats wrong with the tug 😉 #cuoto

[@TimBatSea]

Lol. Thank you for saying that Peter! There are times I want to scream at the comments and put them in their place,. But I try to calm down and remember that only a few people are perfect and they are already on tugboats. Lol Thank you again! CUOTO

[@johnmeyers3954]

Tim, Does the shape of the prop blades cause some of the shaking too? I know that most/all blades are curved to make forward thrust more efficient. I have experienced in airplanes with pitch control to slow the plane down while landing and they shake just a little then too. CUOTO or Toot (or if you are way to the right Toot Toot)

[@TimBatSea]

LOL Toot Toot. LOL. Yes. Most certainly so. CUOTO

[@boblong7686]

If you are looking for comments and preferences on the 360 camera... I would like to see both the flat video and the 360. Certainly understand there's a learning curve with this. But, I know you can do it! Thanks for what you are doing! CUOTO.

[@TimBatSea]

Cool. Thank you for sharing Bob. In the near future, I may try to upload two videos at a time (one flat and one 360). CUOTO

[@user-uh9lg9wg1d]

Hi Tim, I hope your well….what is that white thing hanging down from the ceiling in the wheel house? I sometimes see the radio Mike’s hanging from it. I assume it’s to turn something on the roof of the house. Thx. Jason.

[@TimBatSea]

Thank you for watching Jason. It's the vertical and horizontal adjusters for the search light. CUOTO

[@robertcoplin2830]

Didn't know a thing about cavitation so thanks for the explanation. The notion of water boiling under the surface due to a vacuum created by the boat's screws is interesting. Learned something new. Dubious about the 360 stuff. Will it mess with conventional viewing? Take care of yourselves. Now how did that go? cuonto?

[@TimBatSea]

Thank you for watching Robert. Next week's video is my first try and I already have ideas to do a better job on the next one. For the most part, you should be able to center your view and it will stay in frame. But I don't think I have that part figured out in the next video. But I promise to improve. CUOTO

[@hamradiojim6788]

What about cavitation on tugs using the Voith Schneider propulsion system? Do they experience it during any sort of "hard" maneuvers?

[@TimBatSea]

Hmmm???? I don't know. What a great question. I'll have to ask someone that works on one. CUOTO

[@PDTechGuy]

I enjoy watching your channel from Fort Worth Texas - stay safe sir! #CUOTO

[@TimBatSea]

Thank you very much Todd. CUOTO

[@tolex3]

Excellent explanation on cavitation! Almost like listening to my hydrodynamics professor from decades ago....! ;-) #CUOTO !

[@TimBatSea]

Thank you very much Tommy. CUOTO

[@markmitchell641]

Thank you. LOVE your videos! CUOTO

[@TimBatSea]

CUOTO

[@cgirl111]

Cavitation will erode the prop as the bubbles impinge on it on the high pressure side. While in the navy my engine room actually controlled hotwell level through cavitation. When the level control pump lost net positive suction head it would cavitate and pump less and therefor hotwell level increased until there was enough npsh for the pump to again become efficient.

[@TimBatSea]

Thank you for watching.

[@captdavec590]

You explained cavitation better than my professors at SUNY maritime!:) CUOTO

[@captdavec590]

Re thrusters: I ran many single screw headboats throughout the late 60's and early 70's without thrusters and backed them into tight slips with no problem (wind, tide etc). Commercial fishing trawlers and draggers regularly get in and out of tight spots without them. Sadly, today's younger yacht and dinner/excursion boat captains rely on them to the extreme; unfortunately many lack basic boat handling skills! CUOTO

[@TimBatSea]

Thank you for watching Dave! CUOTO

[@MonkPetite]

Tim, does the tug have constant rpm variable propellers. Or does it still have the old two way turning propellers. Nice to see the 360 cam. # cuoto

[@TimBatSea]

Thank you for watching Monk. No. Our tugs are "conventional Tugs" with fixed pitch propellers and reverse gears. CUOTO

[@t.c.973]

Do you have Voith Schneider drives? What are the advantages/disadvantages of them?

[@TimBatSea]

Thank you for watching. We do not. We have conventional propulsion. The Voith Schneider drive tugs are extremely maneuverable, but I believe are more expensive and require more water to operate in. But having said that, know that I am only guessing and never run one. In fact I do not know of one in all of NYC harbor.