What does water resistance mean? - Watch and Learn #6

[@theurbangentry]

Outstanding!!! Keep it going my friend. Nice one Marc, Best regards, TGV

[@theurbangentry]

P.s. No WWC?!?!? ;-)

[@adityasjagannathan8689]

The Urban Gentry wwc very important! ;)

[@Davitamon76]

it 's actually because of your channel that I got to know this channel and this series. So thanks for that. Both great channels!

[@islandwatch]

Thank you sir! An extreme feather in my cap coming from you!

[@islandwatch]

Ha, I did do it. I'm wearing a Seagull and a Bulova Accutron, but I had to edit it out as it was horrible and I couldn't get it look good. Next time!

[@shariarrahman7562]

HOLY SH** Marc, that was honestly the best watch technical video I have ever seen. I honestly got so hype when you brought out the equations. OMG. best ever.

[@islandwatch]

LOL, thanks.

[@iancarnell5020]

As an engineer and a diver I liked the equations to prove the negligible effect of dynamic underwater activity in relation to static pressure. Love your site and your common sense approach.

[@elzebub007]

This video really sold me on Seiko watches, I had no idea the difference in 200m resistance and Diver's 200 was so great, excellent and informative video!

[@dann904]

I've newly subscribed. Scuba dived many decades ago - it was fun, but nothing I felt I just "had" to do. Plus, it can be expensive. However, I never lost my love for dive watches. I. Own many at varying values, but always end up back at Seiko. They are such great watches at such a great value and can be Modded relatively easily. Love these videos. These are by far the best and clearest on the Internet. You are a great teacher and presenter. Thank you for scratching our dive watch itch!

[@islandwatch]

Thank you for watching (and learning!)

[@RonaiHenrik]

Just started watching this series after I got a bit into watches. It's awesome. It really is a good sum-up for total newbies like I am. Thanks for all the effort and thought you have put into each one of these videos! We appreciate it.

[@justsomesaltyboi8716]

i got extremely invested when you started showing the equations and i am not even an engineer or in college! dude knows his stuff! glad i know more about the water resistence with my gw9400 coming!

[@bigbikerjohn64]

Great video and a clear explanation on water resistance Mark. As a scuba diver, it gives me some assurance that watch making industry has standards to meet in adding to safety. Thanks!

[@taegonlee8625]

The definitive video to the water resistance question. Great job! I also appreciate the use of formulas at the end. Completely removes any confusion or doubt regarding that issue.

[@alexlung09]

Just started getting into watches and Long Island Watch was recommended to me by a few people. This is by far the most helpful series that I have yet to see. Look forward to seeing all the rest of content.

[@islandwatch]

Great, thanks for tuning in!

[@godzillaunchained]

When I find the time I will binge watch an hour or so of your videos. This is the first I have commented on. Coming at this subject as a building engineer I give this video a 12 on a scale of 1 to 10. Just about every topic point covered and super easyu to understand. Great work, my friend.

[@bassfishingwiththeantichri2921]

We should apply ISO standards to politics and journalism. A standard of honesty must be met and maintained to become certified and untruths will result in revoked certification, rendering you unable to work until certification standards have been met once again. Marc, you're a genius!

[@islandwatch]

Haha, not really, just a watch guy. But thank you!

[@davesebring]

I’m really glad I found your channel from the Urban Gentry, I’m binge watching a lot of your videos even the old ones as you can see, I really appreciate your explanations and your attitude, you seem widely knowledgeable and I’m sure your friends and family appreciate you very much.

[@IdioticPlatypus]

Brilliant video! My one nitpick: the little g in Bernoulli's equations is not the gravitational constant. It's the local acceleration due to gravity. The gravitational constant is big G and does not change. It really is a nitpick. Your explanations are wonderful. It's clear you have a background in engineering.

[@christopherj5754]

"Everyday is a school day" is something I sprout to anyone that wants to listen. As a non-engineer , I learn heaps from your vids. Is it no wonder I purchase from you, thanks for the lesson.

[@islandwatch]

Thank you!

[@stevenwymor1398]

This was even better than Part 1. And frankly, the math was the best part IMHO.

[@darksidecarnival5385]

Thanks Marc! That was excellent. I use my dive watches for diving and they are both DIVER rated. I had no idea the testing was so stringent but now I feel even more confident that they've passed the tests. Also thank you for dispelling the myth of dynamic pressure. I was talking with a buddy this week that is an avid swimmer and he brought this up. I had no idea what he was talking about.

[@wigennazarov6009]

One of the best watch channels ever, you actually learn something useful. Thanks very much.

[@washingtonfootballfanwgil8392]

Thank you for making this so easy to understand. Will you start a math for dummies series?

[@islandwatch]

Maybe in the future! : )

[@boutchmanz]

Explained so well! After 10 years of watch interest, I still learned so much from this video, excellent job!!

[@islandwatch]

Never stop learning!

[@Hagemann666]

I'm really enjoying these "Watch and Learn" videos, Marc. I'm not a watch guy. I now wear one because it's my fitness tracker, but I've never owned a mechanical watch (not sure I've even owned a quartz watch, now that I think of it). But I am fascinated by clockworks and intricate devices and machining. I happened to catch a documentary in the early days of HD that showed the creation of couple high-end, Swiss mechanical watches and I was fascinated by it. For some reason, I started to wonder exactly how jewels worked and what they were made of, which brought me to your #2 video in this series. Now I'm making my way through all of them. For the record, I've been interested to see what you looked like, so thanks for showing us your mug. Fantastic series!

[@islandwatch]

Haha, thanks so much for checking out the series.

[@divyanshmishra3551]

LongIslandWatches and UGC are two of my favorite channels on KZbin. Great work Mr. Marc!

[@mosayebmohammadi5198]

Dear Mr. Mark, I am bingeing on your series and I should give you my regards for all of these information/facts you are sharing. From a fellow engineer, salute.

[@TheWatchCorner]

Watched lastnight Mark but unfortunately on an Xbox One can't comment even signed into my KZbin account so commenting now. Great video. I'm watching your older videos slowly but surely! You have not aged from this old video to 6 years later in the present👊👊👊👊💪

[@sqd8r]

Thank you for this, far more information than I sought, none of it boring whatsoever, and it made my watch buying experience more fun. Kudos.

[@nicholasbecklund2171]

Im studying to be a mechanical engineer and Im avoiding my statics homework but sure enough you set me straight at the end haha thanks for helping to remind me my classes are truly relevant! Love the watch and learn series!

[@islandwatch]

Haha, great! One of my favorites is deflection of a cantilever beam; PL^3/(3*E*I) LOL

[@strandlie92]

Wow how have I not seen this channel before. By far the best explanation on water resistance I have seen. And i loved the tiny bit of maths at the end. Greetings from a fellow engineer!

[@islandwatch]

Thank you!

[@RaawrTube]

I just ordered a Seiko SKX007K1! It's great to learn just what value for money I'm getting with such stringent criteria required to classify a certified diver's watch. I'd bought an Orient Ray 2 a fair few months back, but sadly the crown had popped out while I was swimming at the beach and it was too late when I realised salt water inside the dial. Note to myself - always check the crown before entering water. I'm looking forward to receiving my new (and first) Seiko and I love that Long Island Watch has an associated KZbin channel. You provide a lot of useful information. (-: - Aussie consumer.

[@islandwatch]

Thanks for checking it out, and enjoy!

[@stevenlewkowicz5007]

Great video! As a mechanical engineer myself, I appreciate the technical engineering discussion. Keep these videos coming!

[@Fleur_de_lis2k]

This is probably the most exciting watch video ever, great work!

[@pltorok0515]

Mark, you are killing it! Absolutely love these videos! You're hitting on perspective for us watch geeks that I personally think is lacking. We ALL purchase a watch because we love the way it looks but for my engineering brain I want to know how it works. Thank you!

[@islandwatch]

We think the same then!

[@antoniojrdz]

Thank you Mark for taking the time to make these videos. I have truly learned a lot from you and you inspire me to further my knowledge of horology. Cheers!

[@islandwatch]

Thanks for taking the time to watch it.

[@markcallaghan7875]

Excellent. Thanks mate. I'm pretty new to this but I love watches. Your explanations are clear and understandable to a layman like me. Keep it up.

[@BacalaoBrad]

I brought my Seiko skx007 from you guys . The service was great and the watch is beautiful , thank you for posting .

[@bradyyyyyyy11]

Thanks Mark. I’m a bit late to the party, but this was by far the most informative video on water resistance I’ve found on KZbin. Great content.

[@Whipacharm127]

Thank you Mark, I'm a diver and i liked this series on water resistance

[@enriquesanders]

The pressure equation was the cherry on top. Amazing video!

[@mikeontherock]

Great video, watched the previous one to. I look forward to more of your watch & learn pieces 🙂

[@Malcolm1959]

Excellent and infomative as ever, and a nice change to put a face on the voice we all know.... Looking forward to the next watch and learn, as l'm sure there's still a lot to cover in the future!!!

[@islandwatch]

There sure is; stay tuned!

[@ilyaibragimov6255]

Absolutely love this series, I cannot say it enough. Great knowledge to be had. Keep the videos coming Marc!

[@islandwatch]

Thank you; will do!

[@quyenv.nguyen6130]

Dude. This is awesome. It's an old video but I have to say your series of educational materials for watches are hard to find.

[@graemel3069]

Awesome Marc, very kind of you to inform us making us that bit wiser! Cheers Mate!

[@SarcastSempervirens]

sticking your hand out the window while driving is a doubly nice example cause it explains what we're talking about in a practical manner and also tells you why this thing with the pressure is a myth - a watch face is several times smaller than even a small palm, so the surface is small enough that normal movement under water isn't enough to bring it above the safety limit

[@islandwatch]

also, you don't swim as fast as you drive, hopefully.

[@johncunningham5435]

I am a Electronics Engineer; you are right on the mark regarding testing methods, and math calculations. Many watch makers will do a static test at 10 bars for few minutes and not facture temperature variables. I have a Citizen echo watch that was quite expensive, there is no screw on crown or back case, and it is rated at 20 bars. My very expensive Hamilton does have screw on crown and case back rated at 10 bars. I would trust the Hamilton over the Citizen for testing if I chose that path, "great discussion".

[@harcotelindert]

Great video again Mark. This is so educational and different from other channels. Keep them coming.

[@islandwatch]

Thank you. Glad you are enjoying.

[@henkthoma2422]

Thank you Mark. Very informative again. I am enjoying and learning from your great series!

[@islandwatch]

Great, thank you.

[@peternzioka3523]

Clear, concise and to the point. Congratulations 👏

[@kareim27]

Finally the face behind the hands. Wonderful especially the science part. I love the watch and learn episodes. A question. I noticed you are wearing two watches. What's your idea? I want to do that too.

[@islandwatch]

I've been wearing two watches for many years. It's just what I do. I'm a watch guy. I'm also a lefty, so I wear a watch on my right wrist regularly. When I started wearing two watches, it was strange to have something on my left wrist. But, you get used to it, and then, look at that, you can double your rotation of watches!

[@jansheraidanbakhshi960]

Amazing video series! Just got done with ep 5 and 6, I feel enlightened! Thank you so much! Hope you keep this series going. I just suscribed.

[@josephstark4944]

Yo, I don't normally like or comment on videos but I've been loving this series. Keep it up man, there's not enough good watch educational videos on youtube. How to use a Divers Bezel would be cool like you mentioned. The same for using chronograph and moon phase/date functions. All those would be welcome additions to this. Though you can find them elsewhere on youtube, you're doing a fantastic job explaining things and it belongs all in one place.

[@islandwatch]

Okay, noted!

[@MiguelBerCeb]

Nothing better to clear guesses and myths than bringing up the math.

[@69fastfurious]

Well done Professor Marc 🙌 Definitely at least you know what you are saying and talking about, nothing compared with references this or that watch is etc etc ! By the way have two Certina’s iso certified iso 6425 that’s a plus have another Citizen Prodiver 200 meters divers certified, got one question for you do your Islander watches 200 meters ok for divers? Or you have to go to laboratory for iso certified your watches? Keep up with these very educational videos 💯 🔝

[@alibaba02121996]

I was just doing wind calcs for a building today using the dynamic pressure equation. Excellent video!

[@alone66666]

Great info, I just found your channel yesterday (recommended by TGV), These watch and learn series are my favorite, everything I wanted to know, nicely presented in an hour or so. Are you planning to do more of these, and if so, on what topic?

[@islandwatch]

This was the 6th installment. I try to get one a week, though coming into busy season it will be tough to keep them going, but I plan on continuing them! Tell your friends : )

[@chakravarthyn1]

Love the content you put out. More power to you, brother!

[@islandwatch]

Thanks!

[@dmitrybelyakov]

Yeah, Mark, really good and insightful videos. I'm really waiting for each new episode and learn A LOT!

[@jokensy101]

Your videos are getting better and better!

[@islandwatch]

Appreciate that.

[@thomas9858]

it's really a controversial subject. I reviewed my swatch Irony windfall, which I own for about 20 years. I use it for everything like swimming, showering, windsurfing etc.. never had an issue with it. I even use to operate the chronograph under water! As soon as one of my watches mentions water resistant, I'll take it for a swim although I try to avoid that if it's fitted with a leather strap..anyway, nice video! cheers

[@islandwatch]

Haha, yes, true. Thank you! I've seen 30 meter watches used for diving and 200 meter divers fail in the rain!

[@jhelwig19781]

Marc, very insightful. Love your passion and unique product line.

[@islandwatch]

Thank you for watching.

[@senged]

I have a quartz Rodania since 2002 with 50m WR. Used it many times while snorkelling at depths around 5-6 meters every summer. I have even cleaned it in 1:1 diluted spirit of salts (~9% nitric acid) to clear the gunk that accumulates over time. I have had is battery replaced in the store I purchased it and in other stores, too. Never had any signs of water getting into the watch. It has a screw in case back. I believe good brands usually under-promise these types of specs.

[@mike891204]

Excellent video, concise and technical! I wish we could have done water resistance tests in fluid mechanics labs in engineering school back in the day...a perfect application of theory, plus it would teach students to read and interpret code specifications.

[@islandwatch]

Best graduate level class I took was a guy who taught some theory, then backed it up with a real world example!

[@mike891204]

I never made it to the graduate level haha! Called it quits at the bachelor degree and now I am in the natural gas transmission industry. Thanks again for awesome explanation videos!

[@JohnThomas-su5bw]

I always learn so much from your videos,please keep doing them.

[@dennisalonso1029]

Great video. Love this series. It takes the term, "watch nerd" to a whole new level.....and that's a good thing!!

[@islandwatch]

Thank you!!!

[@dallaswoods9537]

I never believed what was stated about movement force on a watch in water was a valid concern. Since I understand the math and physics of fluid dynamics I did not bother calculating it. I knew all along that the change in pressure exerted on the watch and seals due to motion would be nothing, relative to the weight of the water at X depth. Pressure is a function of resistance to flow, and a watch presents very little resistance. I concluded the concern about dynamic water pressure effects on watch seals was pointless. Glad you did the math though.

[@disasterpiecemusic]

Wow - love the engineering lesson in the end. You teach with great humility.

[@shmendrik213]

Thanks for the video. I suggest doing a future watch and learn video on how to use a slide rule bezel. I found the owner's manual of a Citizen Nighthawk to be quite informative on that matter.

[@islandwatch]

Thank you! That is actually one of my ideas, but it can get quite complicated. Thank you for watching.

[@yohskytruong]

Thank you for the informative video Mark. I'd definitely have destroyed my watch otherwise. This motivates me to get a proper diver watch for vacationing and outdoors activities purposes.

[@islandwatch]

Great timing then!

[@artswri]

Great info, thanks! Esp the dynamic pressure debunk. Also the info on ISO 6425, great stuff

[@azizhusseinz2083]

Thank you! Very helpful topic. Great idea on fluid mechanic, the dynamic pressure is sometimes I never considered. I love your engineering perspective on to the watch.

[@islandwatch]

Thanks!

[@yonkeythedonkey]

This series is brilliant, thank you! Very informative, very easy to understand :)

[@islandwatch]

Thanks!

[@frankwesterdorff]

thanks. that math's/physic's lesson helped me a lot understanding the trade [wristwatching: tissot seastar chronograph, 30 bars, blue-black dial - i love it].

[@markusbe.musicfromtheunder2497]

Thank you for sharing your knowledge. Really great video.

[@ManoloVintage]

It's like I'm going to online watch College! Great videos thanks.

[@islandwatch]

Tuition free!

[@philipjanes]

Great video. Lots I didnt know but glad to learn (except the math, I'll take your word for it) Oh, what watch are you wearing?

[@islandwatch]

Seems you shouldn't! I made an error; edit in the summary. I was wearing 42mm Seagull reissue and Bulova Accutron Spaceview.

[@lyndon6511]

Another great informative video Marc! please keep uploading.

[@islandwatch]

You got it!

[@JerehmiaBoaz]

16:08 Quartz divers are falling out of favor because divers use dive computers instead. Dive computers basically are souped up digital watches that present a lot of diving specific information and run on lithium batteries or rechargeables. They have battery indicators and warn explicitly if you try to use them when they're low on battery.

[@islandwatch]

I probably should have clarified that. Most of the Seikos and Orient divers have gone away from battery. I do understand that dive computers are quite popular. Thank you for the insight.

[@psychalogy]

Dive computers are great but I still use both. Always good to have a manual backup when I’m underwater.

[@triples4good]

Marc. Great video. i really love this series. Very interesting. The engineering perspective is great. BTW, what watches are you wearing? Thanks again.

[@islandwatch]

Seagull 42mm re-issue and Bulova Accutron Spaceview.

[@Byrnzi360]

Remarkable. Absolutely remarkable. This is an amazing video. I've learned a lot! Thanks for posting it!

[@islandwatch]

Thanks for checking it out.

[@Grumen67]

Great video…I learned a lot from this with which watch rating to buy for a true Divers Watch. Thank-you!

[@cynical.2atee]

I was a scuba diver for about 12 years from mid 1980s to late 1990s. I would spend $15 to $25 for Casio digital watches labeled 50 meters and took them down, usually 50 to 60 feet, sometimes to 100 feet or a little more. Worked fine, never a failure. One of my instructors told me he had one in which the water pressure at 80 feet or so started pushing the watch’s buttons and it went crazy. Never happened to me. I swam with these watches, ran, rode bikes…they would take a licking. I would use them until the cheap plastic watchbands would break then it was back to KMart for another one. I no longer dive, but I swim with a Timex Ironman. I limit my Tissot and Omegas for more civilized environments. They say ignorance is bliss. I was a happy diver.

[@andydass3437]

Excellent video. I’m no engineer but appreciate the engineering perspective of it.

[@tengumann]

So here is my question. Since we figured out that movememnt in the water doesnt really put any significant additional pressure to the watch and since 30m WR watches have been tested to 3atm pressure, WHY shouldnt I go swim with it? Im really curious because the answer usually is that you're moving, while swimming and that adds more pressure, but you yourself did the math and thats wrong(i mean its way less significant than what they mean). According to the math i could even dive with that watch to ~29 meters. A simple 3BAR water resistant watch. But again in the end you say that what we should get out of this video is that 3bar WR isnt suitable for swimming, which contradicts your math. Im confused.

[@islandwatch]

Indeed it is WR to 3 ATM, but watches age, not every single one is tested, etc. So to be safe you should not.

[@sethveenbaas5704]

Mark, love your videos! I was wondering if you have advice for removing condensation or moisture that builds up inside a watch? I recently flew and now I have moisture built up on the inside of my crystal. My watch is a Hamilton Khaki Auto for reference. Thank you!

[@simranjeetsingh4351]

Loved the video .. especially for those equations....brought back some other equations in my mind

[@munawarhussain9859]

WO WO the man behind the hands love you content . you are the WIKI watch of youtube congrats.

[@islandwatch]

thank you! Great moniker!

[@azguyazdesert417]

You briefly mentioned orange colored hands and dial markers and the reason why they were orange in color. You never went into detail as to why. I think that color scheme is very sharp, and I am planning on doing a dive watch on my next build with that color scheme. Why orange instead of some other dark to light contrasting color scheme with the hands and dial markers. Is there something more to it than just a Hi-Vis appearance? Very informative and awesome video, I never imagined water resistance on a watch was that spacific. Thanks.

[@patrickmacleod2415]

Great video. Very educational and so much so that if I'm ever in the market for a watch again, and it's one you sell, I get it from you. However, I think your negative comments regarding quartz divers is misguided. First of all, all dive computers (which is what real divers use in the modern age) are battery operated. Second, most high quality quartz watches indicate when the battery is getting low by skipping every two seconds. Third, there is a much higher chance of a mechanical watch developing an unknown problem and even stopping than there is of a quartz watch suddenly losing battery power. Fourth, if you have any problem with equipment, being a computer or watch, you simply end the dive and slowly return to surface, and serious technical (deep) diving requires redundant technology. The truth of the matter is that if watch wearers were really concerned about having the most reliable and durable watch, all sports and dive watches would be quartz. The reason less companies make such quartz watches, particularly at the high end, is that watch enthusiasts simply prefer mechanical watches for reasons other than logic and practicality. I like mechanical watches too.

[@islandwatch]

Thanks for sharing!

[@x_gamerlord_x7736]

You are lefty ,,,,,,,

[@operasinger2126]

yes, watches are like no other market. $15 dollar digital display watches probably keeps much better time than quartz operated watches. And quartz operated watches probably keep much better time than automatics. my $40 casio digital display watch quite reliable after 4 years of going into the ocean always pressing temp indicator function w/o having to replace battery. finally give it to friend to get something new.

[@raymondmalone9721]

Just loving these videos , great content. Keep up great work👍

[@islandwatch]

Thank you.

[@Warioda]

Another one out of the park, man! Thank you Marc.

[@islandwatch]

Thank you!

[@zohaibasif6274]

17:53 "If a shark tries to bite it off" *if a shark was trying to bite off my watch would I really care about my strap* 😂

[@Mikishots]

I really like my strap.

[@dailylifeandtalkswithhameed]

Hi Marc. Pl do a review on Watch movements like ETA , Powermatic, tourbillon etc.

[@johnarrigo-nelson9667]

Thanks for another fantastic video, Marc! Love these. Stony proud! :)

[@islandwatch]

Haha, thank you!

[@mgmmaze]

I remember seeing couple of people on ye ol internet say never even shower if it's only 50 meters. My timex Ironman survived 12 years in the Marines before it finally died and that thing almost never came off my wrist. I know that's quartz and not mechanical but I think sometimes people way over think these things

[@psychalogy]

You can always get lucky with a watch, I just wouldn’t trust anything important to one with a low rating if the intention was to take it into hazardous conditions.

[@1SaG]

Funny... like most other people, I've been assuming that "30 meters of water-resistance" means just that. So I've abused my watches over the years quite a bit, especially the beaters. Which, I have to be honest, were mostly regular Swatch models. And I haven't had any of them croak due to water intrusion. I've used them while fishing, swimming, water-skiing, snorkelling, boating ... you name it. And most of the time I was in sea-water with those cheap little plastic watches, thinking they'd be perfectly safe ... :D Come to think of it, I've been wearing Swatches since the late 80s ... and the only one that ever died on me was a late 90s Irony Chrono that, after 15 years or so, started to suffer from a misaligned second hand.

[@andyt9132]

Hey Mark, really informative video. I have questions Does jumping/diving INTO water affect the watch you have on? If a lifeguard decides to wear a watch at the pool, what specs would the watch need to have in order to survive the impact on the surface of the water when he/she dives into the pool to save someone? Thank you and keep up the amazing work

[@islandwatch]

100M would be my choice, 200 better since it has a screwdown crown.

[@MrTheMikael]

And what about water resistance 200 m with no screwdown crown on my Timex Tx49803 ? Why another watches have 1000 m water resistance with no screwdown crown ?

[@Mikishots]

Math checks out. Great vid, thanks for doing that.

[@Robert.Dickson]

Fascinating and informative video. I look forward to more.

[@islandwatch]

Me too! : )

[@garywillacey9979]

That was very informative. You are a very good teacher, thank you for your knowledge. Bless

[@CaptainRambunctious]

Fascinating. Thank you. And well done for the Physics. Very welcome.

[@islandwatch]

Thanks!

[@TheWoodStroker]

I learn, therefore I thank you.

[@islandwatch]

Thank you DesCartes!

[@TheWoodStroker]

Ha! Good one.