Why Are These Ships Designed To Sink?

[@qihengng5993]

a ship shipping ship, shipping shipping ships

[@Ricklet0ons]

Yes but what ships that are shipping ships, that are shipping those ships, shipping ships, shipping ships?

[@JohnFallot]

A ship shipping ships, shipping shipping ships shipped shipping shipping ships, ships shipping ships shipped shipped shipping ships. Translation: A ship that transports ships, which is shipping those ships, was itself shipped whilst shipping ships. It is shipping ships that themselves are shipping ships. Recursive shipping ensues.

[@pedror598]

The word ship no longer has any meaning to me

[@ErnestMC]

Hahaha you maid my day.

[@Chronostra]

@@ErnestMC what about the butler, lol

[@frederiknielsen6038]

Occationally, these ships will show up on radar as two seperate echoes if they are large enough. This can lead to a few minutes of head scratching as you try to figure out what exactly you are looking at.

[@chaomatic5328]

I say it's a traction raft following it's unsuspecting prey. Good ol' municipal Darwinism!

[@seantaggart7382]

*Looks at radar* HOW THE H-- oh okay

[@Tkmined]

Honestly, these damn things are so big that I wouldn't be surprised if you saw them on the horizon before picking them up on Radar (in a clear day of course)

[@iwatchwithnoads7480]

"Russians are coming"

[@Ky-kx2hd]

Can you do one about those semi-submersible vessels that turn sideways? Like, the bow points upright when it's deployed? That's some crazy engineering.

[@jellysquiddles3194]

Isn't that this 1 unique research vessel?

[@LocalChamp]

@@jellysquiddles3194 Still would be a cool video.

[@jellysquiddles3194]

@@LocalChamp Yeah!

[@kilianortmann9979]

@@jellysquiddles3194 Yes, the RP FLIP (floating instrument platform) scientists love their acronyms.

[@PianoKwanMan]

@@kilianortmann9979 Inconceivable. That's quite an unthinkable ship

[@awmperry]

We had one of these - Zhen Hua 33 - in Stockholm in 2020 when a new bridge was being delivered from China. It was assembled on two barges, floated aboard and welded to the deck, and transported all in one piece. I was posted to guard her quay during her visit - impressive boat.

[@cattraknoff]

I'm sorry bro but that bridge will collapse inside of a decade or two, it was made in China for export.

[@awmperry]

@cattraknoff I don't have a horse in the race either way. A lot of people hate it - as far as I'm concerned it's a bridge like any other.

[@Meatrocket69]

@@cattraknoff you have no idea what you are talking about stop making stupid comments please

[@jishan6992]

AHH china, getting their hands in every countries pocket

[@LPRD]

Perhaps interesting to mention that both the blue marlin and Vanguard are owned by one company, (dockwise), now part of Royal Dutch Boskalis. I love these kinds of niche ships

[@medea27]

For me, the most impressive moves the semi-submersibles make are the oil rigs... out of the water they are so tall & wide with such a high centre of gravity that it looks like a truck carrying a 6-storey office building on the trailer! The forces that all that steel resists are truly mind-boggling.

[@VladimirStepanov-e6h]

Center of gravity can not be very high. Otherwise listing en route in the seas will be so centripetal, that the ship will be tipped over shortly after departure.

[@charliescott7764]

The other application is to substitute for dynamic launches of ships. HMS Glasgow Type 26 Anti Submarine frigate was recently skidded onto a barge at Govan on the Clyde, towed to Loch Long, floated off and taken back to Scotstoun for filling out. Dynamic launches are much more dramatic but also stressful to the hull.

[@PsRohrbaugh]

I'm no shipwright, but I always thought a dynamic launch was a good stress test.

[@mandez3498]

I was fortunate enough to spend a week on the HMAS Adelaide and seeing the Canberra brought back great memories. Thank you again to the the Australian Navy!!

[@everythinglakefreighters47]

Can you guys do a video on how the design of Lake freighters on the Great Lakes have changed throughout the decades? Would make for an awesome video

[@psychosorcerer9438]

The title of queen is cursed.

[@everythinglakefreighters47]

Nah, the title of unsinkable is even worse

[@everythinglakefreighters47]

Like literally

[@philb5593]

Username checks out.

[@psychosorcerer9438]

@@everythinglakefreighters47 The Regina: sank. The Morrell: sank. The Bradley: sank. The fitz: sank. The original queen of the lakes schooner: sank.

[@Roblox_Player1911]

I like how it's called the "Blue Marlin", meanwhile it's painted orange.

[@xmarksthespot6699]

"moving ships is just a side hustle for them" damn that was badass

[@pakoize]

Thank you, when I was a child my grandfather instilled a love for sea and ships trough series of stories and books. But then life happened and I found more profitable ventures. Casual Navigation you have been a God sent and rekindled that old passion and interest

[@Arthur_da_dog]

Man, your channel has gotten so far. Having been following you since your very early days (

[@beardedchimp]

I've been watching since maybe 1000 subs when I was trying to search for something ship related and came across their early videos. I'm so happy that their hard work has paid off. The early videos were full of comments saying "I can't believe you don't have more subscribers, I hope you take off!". Lovely to see that has actually happened.

[@Arthur_da_dog]

@beardedchimp we all had faith in his success. We knew he was going to hit it big.

[@sirBrouwer]

i have worked on one of the two semi's from Big Lift. while it was in port. they were actually working on two at the same time as they. the two sister ships would have to be work in tandem. it was even for them a new thing. they only needed to be able to lift the actual platform out of the water and (the reason as to be in tandem side by side) sail so that they could sail above the tower part. really impressive

[@bigutubefan2738]

Great video, as ever! I'd be fascinated to see how the calculations work to show the centre of buoyancy is still below the combined centre of mass when lifting/pumping out starts, and any effect on the GM moving due to the ballast tanks (the same effect from sloshing, as in your "Potatoes almost Capsized this ship" video (Commodore Clipper), the free surface effect inside ballast tanks that are only partially filled).

[@Tinil0]

Yeah this HAS to be a mathematically complex operation. I have no doubt they have worked it out, but it does make you curious, huh?

[@turbooggyboy]

They actually used one of these to transport a bridge from China to Stockholm, which took the ship through the Stockholm archipelago to drop the bridge onto barges near the city center, which then allowed for the bridge to be pushed into place.

[@mortified776]

It's worth mentioning that the load is welded to the heavy lifter's deck after being raised and is cut free before refloating. Needless to say, with this kind of load the risk of it coming lose while underway needs to be as close to zero as humanly possible! First time I saw anything on a heavy lifter upclose was HMS _Nottingham_ on the MV _Swan_ in Garden Island, Sydney back in 2002 after she had that all too close encounter with Wolf Rock off Norfolk Island. The Type 42 destroyers weren't big ships even compared to their contemporaries (very much a bean counter's design), but even she seemed oddly colossal with her whole hull out of the water compared to when I'd seen T42s alongside elsewhere.

[@FerroequinologistofColorado]

I am insanely fascinated by these specialized Semi-submersible heavy lift ships.

[@The_Viscount]

You can actually trace this back to a similar design the US Navy began using in the early 20th Century. Floating Drydock USS Dewey YFD-1 was launched in 1905. The vessels developed based on this design provided essential forward repair support for the US Navy during the island hopping campaign of the Second World War. Once an island was secured, a floating dry dock and supply ships could be moved into a suitible cove or existing harbor instantly providing the ability to repair, rearm, or refit even capital ships (Battleships and Carriers). While the number available was not high, it did allow for quick emergency repairs to help a ship survive the journey from the front lines to the US West Coast.

[@cyrilio]

These Dutch ships are amazing. Would love to see an episode on crane ships.

[@michielput3311]

I once was in the port of Rotterdam for a tour of the newly reclaimed land. The harbour on it was already kind of in operation. At the time the pioneering spirit, which used to be one of the biggest semi submersibles and the at the time biggest cargo ship, the HMM algeciras, were both in port. The pioneering spirit was submersed and carrying some kind of platform but there were problems on board accoarding to the tourguide so it wasn't going to actually move for a few days.

[@sereminar4]

That's so rediculously cool!!!!

[@jamnchips]

At 1:42, the text describes the boat as a “heave lift vessel”. I’m not entirely sure if that is a spelling mistake or intentional, considering it does indeed lift things on the heave axis, which makes the caption technically correct

[@alexrossouw7702]

I often see these ships hauling gigantic rigging structures just off Cape Town's coast.

[@TheUnknownDutchman]

In a previous video you explained the difficulties & dangers of drydocking a ship. I would think those risks would be highly exaggerated by working boat to boat during the docking phase?

[@robinj1052]

Excellent video once more, thanks. Pretty clever to use a semi-submersible vessel to transport a semi-submersible rig, isn't it? It is massively impressive: the DOckwise Vanguard can lift up to 110.000 tonnes. If you compare that to heavy lifting vessels, like the Heerema Sleipnir (20.000 tonnes in tandem lift) or the Allseas Pioneering Spirit (over 48.000 tonnes and the largest vessel in the world - also kind of semi-submersible), it is a huge difference.

[@mr_gerber]

I've seen both Pioneering Spirit and Saipem 7000 up close, and I have to say they're extremely impressive!

[@robinj1052]

@@mr_gerber I agree. Have not been on the Saipem 7000, but have been very close to it. Comparable to the Thialf, which at the time, was actually also in the area. They both were moored in Stavanger region, Norway.

[@bas6983]

Dockwise/Boskalis has a solution for the buoyancy casings. The MS3 has/had a 300mt counterweight at the stern. She was able to submerge with the casings placed in their storage position. Lowering the counterweight to the bottom and “winching” the vessel down gives sufficient longitudinal stability to operate without the casings.

[@CzechTex]

Always interesting to see folks explain the Blue Marlin, and her role in saving the USS COLE. I was only 11 when she was attacked and my Uncle aboard her. Fortunately, he was not harmed, but it left a deep impact on him indefinitely.

[@CaledonianOptio]

I've had multiple semi submersible heavy lift ships anchored off my hometown to load/unload oil rigs including the Blue Marlin over the years

[@paulburman9972]

Another great video. Thank you ⛴🛳🛥🚤

[@seanworkman431]

I was working on Sydney Harbour or Port Jackson as it is named on the charts, when a RN ship that had been holed off New Zealand was loaded on a semi-submersible for the trip back to the UK. It was a surprisingly fast operation but off course we couldn't get close enough for any good photo's. Sure beats towing long distance.

[@Olebull93]

I see the Russians have implemented this feature on some of their navy ships. Take the Moskva for example, it has demonstrated a nack for staying under water.

[@EmpressSock]

We have a similiar thing in our harbor in hamburg (germany) they are basically dry docks that float in the river!

[@Gallalad1]

I'd love to have been in the room when they came up with this. Like there's just two lads trying to work out how to move those structures. One lad hits the blunt and is like "bro.... What if we got a massive ship and just sank it" Second lad is like "but bro, then we lose the ship" First lad responds "that's just it bro..... We make it rise again" Queue mutual "brooooooo"

[@OneDullMan]

Too cool. Thanks for this. I'll have an eye for these during my shio spotting endeavours

[@extremelycreativeusername]

The MV Blue Marlin in currently anchored off Singapore as of the time of writing this, I've managed to get a glimpse of her and she is amazing to see in real life up close

[@benoithudson7235]

I saw a pair of GPO semi-submersibles in Halifax this summer hauling blades and towers for some US offshore wind project. I was a bit confused, since there was seemingly nothing floating on it, but maybe they were on a side gig?

[@CannonGround]

Another excellent video! In the same vein, I would love to see a video on floating drydocks, and/or the R.P. Flip!

[@196cupcake]

If a heavy lift vessel gets damaged, what carries it? Can they carry each other? Maybe using two, side by side, to carry one? Or, would it be allowed to sink where it is?

[@sirBrouwer]

well yes that is possible. for about every version there is a bigger one (unless you are the biggest) and other wise yes you can sail in a tandem like way. I have been somewhat involved with Dockwise when they had a project where they indeed needed to lift a big jacked using two semi's in a tandem side by side. If yo have the money with ships about everything is possible. your biggest limitation is that you will need a port that can accommodate it

[@adillakandi.r]

Just using the bigger heavy lift vessel to carry another heavy lift vessel

[@196cupcake]

@@thesauce1682 Exactly! That's what I'm saying. Imagine that conversation: "Sir, usually in these situations, we'd hire a ship carrier ship, but this one is the biggest of the ship carrying ships, so ... we'd have to build a BIGGER ship to carry this one ... so, I think we should let the Sea take her, sir."

[@sirBrouwer]

@@thesauce1682 they could use two of those ships at once, or just use enough barges to do the trick.

[@CaptMarkSVAlcina]

I live in Melbourne Australia and very glad you said Port Phillip and not Port Phillip Bay.

[@farmerpete0768]

That’s probably the perfect shop in rough seas, just submerge itself under the water and avoid the big waves

[@slothfulcobra]

Some of these are used for taking yachts on long journeys, since yachts are usually designed for luxury instead of long voyages, so wealthy people will jet across the sea and have their yacht transported after them.

[@bredsheeran2897]

What do I do if this submersible boat needs to get towed

[@robbabcock_]

Wonderful video! I'm learning about things I never even knew existed!

[@baileywright1656]

Awesome, I always wondered about these - thanks for the video!

[@TheTeaLordRBLX]

They’re classed as “Heavy Load ships” on vessel finder if you wanna see where some are

[@JohnnyAngel8]

I never knew semi-submersibles existed. Thanks!

[@aporlarepublica]

I was at that Spanish port when they took the Canberra's hull to Australia. And boy, yes, that thing was big...

[@CaptMarkSVAlcina]

They was other one as well after that. Came to my Port in Melbourne Australia

[@ApexPredatorWithSungGlasses]

Do an explainer about other semi-submersibles. IIRC there are those ships that kinda flips? I don't know the name but they're semi submersibles too, but instead of the whole ship semi-sinking, the stern fully sinks, while the bridge on the bow remains afloat and flips 90° upward.

[@hwebbb-xr8fe]

I work on jack up heavy lift ships, do a video on that to show people how cool they are

[@auntbarbara5576]

Aunty Barbara's favourite ship channel!

[@mbvoelker8448]

Those ships are simply incredible!

[@zacm.2342]

Was half expecting the 'ship shipping ship shipping shipping ships' meme to come up :P

[@LNgKhoi]

I thought these things existed, but doubted that because nobody ever talked about them. Now it is verified in front of my eyes.

[@seanscon]

Hi how do the balast tanks take in water? are there finlters to block large objects such as fish, so that they dont damage the plumbing? thank you

[@crimsonsnow2469]

Ballast tanks do have some sort of filters and some ships have whole cleaning system. First use is ofcourse is to prevent any contamination, but second of all it's to prevent any invasive species to be released into countries where it would harm the ecosystem. (example would be crabs from China appearing in Germany, destroying ecosystems). This is because of you taking in the water in your departure port and releasing it in the arrival port.

[@shiamjad]

i love all your informative videos... you make them so easy to understand... keep the excellent work going

[@pubcollize]

1:29 "really specialized vessels designed to lift and carry immensely heavy floating objects like oil or eggs and occasionally other ships"

[@hughrichards4193]

But how do they secure the load?

[@Zestrayswede]

These ships have also been used to transport things for some bridge and tunnel construction projects, I'm pretty sure... _or maybe they were just semi-submergible barges_

[@adro894]

Yes I see these ships a few times a year moving oil rigs into port for servicing

[@QbertTehKiller]

Halloween idea for your channel: on Halloween do a video like this and then slowly transition it to a story about how the crew is trying to escape a kraken or sometging

[@livingsimplytosimplylive6817]

Happy New Year’s

[@xander_man]

I’d be curious to find out whether they do things like painting, cleaning, etc. whilst the hull of the passenger is out of the water

[@zaco-km3su]

Heard of these. Quite impressive.

[@johnburn8031]

I've never heard of such ships before. 😮😯

[@AbrasiveCarl]

The cost of concordia, what a great internet historian video.

[@cagedtigersteve]

I’ve seen this Blue Marlin hauling an oil rig before. Quite a site to see.

[@Whomobile]

But what do you do when a heavy lifter needs a heavy lifter?

[@Aviation129]

4:33 RIP Costa Concordia

[@reubenjackson7829]

Could you make video on how they secure these ships to their decks

[@seamuspink9098]

A worthy oponent to the aircraft carrier The watercraft carrier

[@IamStaked]

What keep these ships stable? If the bottom part of the ship is very light. Wouldnt that put the center of buoyancy and center of gravity way up?

[@christophersummers1939]

this ship goes down so often, we've rechristened her the mv _yo mama_

[@ajidamarjati]

Just read about Dockwise Vanguard (BOKA Vanguard). By theory she can fit entire Titanic on her deck. Unbelievable!!!

[@dooluv5769]

So, u have a very heavy ship on a ship and yet it floats, but you fill some ballast tanks and it submerge. Isn't a warship heavier than water?

[@homnin5801]

The warship most likely would of been drained of fuel, ammunitions, supplies, ect so it will be lighter. Also semi submersible ships are ridiculously buoyant.

[@Rektek97]

And how do these specific ships get transported?

[@DylRicho]

It's still fascinating how they can hold 70,000 tons without breaking apart, and that's without considering the physics behind buoyancy.

[@rauldelgado8907]

It’s crazy that those kind of ships can lift ships that are almost about to sink

[@LostShipMate]

So its a massive pickup truck?

[@rezabela24434]

Nice

[@irfaalwan3590]

can it move when submerge(half obviously)?

[@mr.2minutes161]

1:55 but where's the engine?

[@karstendoerr5378]

This idea is not new. The term LASH (Lighter Aboard Ship) refers to a system in which loaded lighters are transported on ocean-going vessels. The carrier ships are called LASH carriers, barge carriers, kangaroo ships, lighter transport ships, or lighter mother ships. The only difference is that they were not used to transport ships, but take on vessels designated as lighters, preherms, barges or barges without their own propulsion in the form of floating standardized cargo containers. At the port of destination, the carrier ship separates from these vessels again. There, they are moved in the port waters, on canals and rivers as inland waterway vessels in pushed convoys. Such vessels first appeared in 1969.

[@vj.joseph]

Each major sea ports can have one so they are readily available.

[@andrewcarlson3486]

Short answer: so they can have the vessel by surface beneath when the blue marlin is in position

[@BUILD.THERE.]

Something about how that ship sinks makes me feel UNCOMFORTABLE as all get out.

[@SH4GN457Y]

Of course the Blue Marlin is bright orange

[@Bird_Dog00]

An interesting variant of those ships would be the Pioneering Spirit. Not realy a semy-submersible as her main deck stays above the water, she uses a similar principle to lift and carry oil rigs. Plus, she's frigging huge! Afaik the largest ship by gross tonnage, with her balast tanks fully flooded, she displaces a million tonnes.

[@robinj1052]

Agree, but they also use jacks to lift topside modules, in combination with limited semi-submersible capacities. And yes, she is friggin huge. Have been on that vessel and had to work on the topside of a platform carried by the PS. Have seen most of the vessel and it just never ends.

[@Bird_Dog00]

@@robinj1052 You worked aboard her? That's realy cool. Must feel interesting to stand - and work! - on one of the largest mobile structures ever built by man.

[@robinj1052]

@@Bird_Dog00 I worked aboard her only for a single project, which took me half a day. She was moored in Rotterdam and I had to be on the topside module that she was carrying to test the jacks of the vessel. It was awesome. Have been on several heavy lifting vessels (Thialf, Stanislav Yudin and Oleg Strashnov), but this one is next level.

[@lexusdriver1963]

One of the coolest ships ever. Load a ship from the poop deck.

[@970357ers]

Always thought these look like something out of Thunderbirds.

[@GentiluomoStraniero]

This is what the US Navy needs to reload the Destroyer, Cruiser and Frigate VLS cells and have the ships return to combat sooner rather than sailing all the way to friendly ports.

[@RobinRense]

I remember this picture on the internet of a semisubmersible carrying other submersibles and eventually som ship of sorts. However, as I cannot find it, I'm suspecting it was fake. Does anyone know about this photo?

[@schwarzerritter5724]

Is the ship classified so you can not actually show any pictures?

[@noahway13]

Is there a ship to transport a shipping ship?

[@Jared7873]

This is how SHIPMAX™ works.

[@morkovija]

wish there were pics to show actual events

[@Harrier42861]

The best-named ships of this type are named the Mighty Servants

[@masterimbecile]

Ship-shipping ships shipping shipping-ships.

[@stephenbritton9297]

Don’t forget the MIGHTY SERVANT II bringing the USS SAMUEL B ROBERTS FFG58 back to the US after her mining.

[@daviddavidson2357]

This should have been in a bond movie.