Hydrostatic Release Unit (HRU) | Rigging and Operation

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5 жыл бұрын

Hydrostatic Release Units (HRUs) allow your liferafts to launch automatically should your vessel sink. They only work if they are fitted correctly.
A correctly fitted hydrostatic release unit (HRU) will also allow you to quickly launch liferafts manually in an emergency using the senhouse slip.
This video will show you the principles of fitting a hydrostatic release units (HRUs) correctly as well as their internal operation. Understanding how hyrdostatic releases work helps you to fit them correctly and, ultimately, to keep yourself safe on the water.
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Пікірлер: 226

@gehteuchnixan69 5 жыл бұрын

I have absolutely no interest in boats or sailing whatsoever, but I love your videos. Very insightful, thanks

@CasualNavigation 5 жыл бұрын

Thanks Gehteuch. Glad you are finding them interesting.

@ieuanhunt552 5 жыл бұрын

Be careful you might fall down a rabbit hole and bing watch all of this channel and move on to other Naval channels. Might I recommend Drachinifel. If you want another soft spoken Englishman who talks about Naval stuff. Mostly warships then I can thoroughly recommend.

@RafaelHabegger 4 жыл бұрын

same here mate

@spiyder 4 жыл бұрын

Gehteuch Nixan lmao same

@MrBen527 4 жыл бұрын

Those are cool devices!

@philippconner2818 3 жыл бұрын

The HRU is critical. I used to work in the commercial fishery and there were many stories of fisherment who cabled or even CHAINED down their raft only for later the raft to go down with the boat. Knowing how to properly set up the hydro is a true lifesaver!

@sed6 5 жыл бұрын

Saved for someday when I own a yacht!

@Macintoshiba 3 жыл бұрын

Owning a Yacht or a Jet will Bankrupt you. No, what you have to do is Lease it! That way you temporarily have it to yourself but you don't have to do all the expensive stuff like Maintenance, keeping it seaworthy, cleaning, etc.

@toasterhavingabath6980 3 жыл бұрын

@@Macintoshiba steal one Terrible idea by the way please dont

@hansandhispanzerfaust6236 3 жыл бұрын

@@toasterhavingabath6980 I also like taking a bath with my pet toaster

@OfficialUSKRprogram 3 жыл бұрын

@@toasterhavingabath6980 the owners would probably never notice. I've seen sailboats stay still on drydock for years, same with parked cessnas as well, an airfield near where I lived closed a few years ago, and it was a nightmare trying to figure out who were the owners, how to contact them, and tell them to move the plane with expired licensing, at their expense. And some of the owners are dead, and it's even harder to find who "inherited" the parking fee, and the moving fee. Sometimes, if you just don't tell them they won't notice it's missing.

@hhuodod2209 2 жыл бұрын

Lots of free boats. Just go to any marinara and ask. X

@OttoTheWeim 3 жыл бұрын

I was responsible for certifying and testing one of these designs for USCG certification. I had to design and build a salt spray chamber, freeze chamber with liquid nitrogen and test them and measure corrosion and operation after each test. Was a really fun project. The ones I tested were the Thanner serviceable units for NATO.

@TheVanuPhantom 4 жыл бұрын

Could we get a video on how the inflation mechanisms of rafts work?

@qdaniele97 2 жыл бұрын

Inside each white shell there're a couple of compressed CO2 canisters (the exact number changes depending on the size of the raft). That orange rope you see in the video, tied to the weak link, is attached on the other side to a valve on the CO2 canisters. When the ship is sinking it pulls the rope down, but the raft pulls up as it would float even deflated. That force open the valve on the canisters, releasing the CO2 and inflating the raft. Finally, the now inflated raft (with its higher bouyancy) pulls on the rope much harder, breaking the weak link and releasing itself from the sinking ship.

@docbrown7916 5 жыл бұрын

Thanks, didn't know much bout this, something never on tv docus. Not likely I'll be on the water again but always good to know how stuff works, great ch, very educational.

@alisterdickson4476 5 жыл бұрын

Excellent explanation as always thank you.

@CasualNavigation 5 жыл бұрын

Thanks Alister!

@csjrogerson2377 3 жыл бұрын

Many years ago I took command of a 37m (121ft) motor yacht. All 4 HRUs were incorrectly rigged in different ways. The outgoing captain, who was not around for a handover, was an incompetent fool in dozens of areas.

@user-xw1ll9ld1z 4 жыл бұрын

i am a cadet i would like to take the time and thank you for your videos , it's crazy how much knowledge i acquired from you. keep it up

@Mr3344555 5 жыл бұрын

I don't study or even touch water, but the knowledge you're putting out is the reason why old people say wow, youtube and the internet would've made me a millionaire in my day. Thank you for the knowledge dear friend, YOU ARE a master teacher. I have my brother who's 6 with me (I'm 21) and I always make him watch videos like this for a bribe and your channel is easy for him to understand and follow along. Thank you, keep up the outstanding work, and keep on smooth sailing :) a like is headed your way, so is another comment to boost your stats. I'd be an inferior man if I can't help the man who's expanding my knowledge!

@CasualNavigation 5 жыл бұрын

Thanks Mr3344555. Glad you are enjoying the content and finding it useful. Your support is appreciated!

@nightw4tchman 3 жыл бұрын

Despite all the safety training I went through with one shipping company, and me being assigned to a life raft over a boat, I never had any of this info given to me, wish I did. Thanks for your content, it's great.

@risingphoenix01 Жыл бұрын

When I was in the Navy, our ship's Safety Equipment Officer was taking me through the workings of a HRU, as I wanted to know how they worked, just in case. But he finished up with, If the HRU fails, it will be the least of your worries. My first thought was of course, the ship is going down. He then looked me dead in the eye and said to me, I would be more worried anything unsecured rocketing to the surface from the downed vessel. He then proceeded to walk away, leaving me to contemplate his statement.

@notjebbutstillakerbal 2 жыл бұрын

This is INTEGRAL, AND THE DIFFERENCE BETWEEN LIFE AND DEATH.

@stephennelmes2537 4 жыл бұрын

Why am I watching this ? I'm on leave. This is work.

@chauhanakash7 4 жыл бұрын

finally one video which clears all my doubts by explaining it beautifully.. thanks

@tihspidtherekciltilc5469 3 жыл бұрын

These videos are addicting and way better than what a television can deliver or an expensive education.

@TracyA123 4 жыл бұрын

Wow! That's some scary stuff. Seems idiot proof but people still mess up securing them properly. You'd think if your life depended on it you would triple check that it was properly done.

@antoy384 4 жыл бұрын

I wonder why it’s is not delivered as black box so people can’t plug it upside down.

@Krahazik 4 жыл бұрын

Complacency is part of the answer.

@x--. 3 жыл бұрын

Idiot proof? That seems idiot proof? You have some genius idiots in your neck of the woods. That device seems WAY easy to install improperly or to overly secure because you don't trust the mechanism. Or for corrosion to damage the auto-detach mechanism. Or for someone rushing to do maintenance to forget to properly secure the painter. Or like any number of easy-to-miss/easy-to-forget checks.

@skippyguy3 3 жыл бұрын

@@x--. that's why you have weekly SOLAS checks and annual surveys....

@assassinlexx1993 3 жыл бұрын

When you make something idiot proof. The world makes a better idiot.

@bartdr5146 4 жыл бұрын

I watched this video last year and I'm proud it's recommended to me again

@347Jimmy Жыл бұрын

Such a simple and effective design, superb engineering

@mtnbkreric1 5 жыл бұрын

Very cool. You learn something new everyday

@gregaldworth1200 Жыл бұрын

Do be aware of the water depths your ship/boat is operating in. If the raft's painter length exceeds depth of water, the raft may not inflate after being released by the HRU. You will still need to to manually haul out the remaining painter, finally giving it a sharp tug to cause inflation. Great video, thanks!

@oldmech619 4 жыл бұрын

I have been on boat a bit and always wounded how release system works. Thanks.

@Steven-dt5nu Жыл бұрын

I have learned a lot of interesting info from your channel on maritime stuff.

@ral387 5 жыл бұрын

I love your video so easly to be understood

@milandjuric8043 5 жыл бұрын

How simple yet ingenious mecanism. Keep up the good work.

@CasualNavigation 5 жыл бұрын

Thanks Milan. It is a great little bit of kit. Simple and efficient.

@swisstraeng 4 жыл бұрын

@@CasualNavigation I do dislike the "weaklink" part, but I guess, if it's done correctly it should work all the time.

@Seth-mu3wo 3 жыл бұрын

I'm not a boater, but this was excellent. Thanks for doing such a great job.

@mutemi2412 5 жыл бұрын

Good and simple explanation! 👏

@CasualNavigation 5 жыл бұрын

Thanks mzee

@baileywright1656 3 жыл бұрын

I am so impressed with your animations! Excellent work!

@sparty94 3 жыл бұрын

seems like a lot of things can and do go wrong with this configuration. i'll sleep on it tonight and show everyone the way tomorrow, after coffee.

@Cedrik_BOI 3 жыл бұрын

This gives me some Payday 2 vibes. During the yacht stealth mission, sometimes me (we) had to search those capsules. At first I didn’t really knew their purpose until I found this video, so thank you.

@krutikamanjrekar93 4 жыл бұрын

Nicely explained. Thanks for the clearing the doubts

@nihanjahin 3 жыл бұрын

nicely explained and visually represented,helped me a lot...!

@Flies2FLL 3 жыл бұрын

Awesome! I've seen these on cruise ships and wondered about them.

@felipebetioli4391 4 жыл бұрын

I LOVE THIS CHANNEL!!!

@phongdominh1391 5 жыл бұрын

good information. thanks

@Mihalyofficial 4 жыл бұрын

Great vids! Keep them coming.

@mohammadaamirshaikh9272 3 жыл бұрын

Thank you so much for this video 👍

@yeahidk5796 3 жыл бұрын

Thanks KZfaq recommendations!

@muhammedaliroshan7848 5 жыл бұрын

It's so much help more me to learn

@nidamreps 3 жыл бұрын

Feb 5th, 2021, 285000 Subscribers. I just discovered this channel and I tell you, if this guy will keep making videos this channel will habe a few mil. subscribers in the next years. Awesome content. Very interessting.

@budmeister 4 жыл бұрын

If only the Titanic had these.

@ibalrog 3 жыл бұрын

If only the Titanic had these, then everybody else would be in a lot of danger.

@andreaskavak2364 3 жыл бұрын

@@ibalrog how?

@panachevitz 3 жыл бұрын

@@andreaskavak2364 It's a play on words meaning that only the Titanic and no other ship would have these.

@richardchantlerrico 3 жыл бұрын

@@andreaskavak2364 We learned alot of (painful) lessons from Titanic, if it had not sunk how it did then far more lives may have been lost in a future disaster.

@FrederSnorlax 4 жыл бұрын

i've seen HRU installations where the rigging loop was upside down - low friction point shackled down, HRU cutting in between the painter attachment and the deck shackle. Those installations, won't open the raft, right?

@x--. 3 жыл бұрын

Terrifying. This seems like something that crew could easily overlook and complacent masters would never check. The sort of thing that would instantly tell you whether you should trust the Captain of the boat or whether you've got yourself a Captain Schettino.

@synp9ynir 3 жыл бұрын

Brings back memories. 18 years ago I got my skipper's license. As part of the exam, which happened on the school yacht, the guy pointed at the life raft, and told me to explain how this gets deployed automatically if the vessel sinks. TBH, I wasn't prepared, but I figured I'd could figure it out just by looking at it. Took me 10 seconds to figure out that life raft was going down with the ship. So I confidently said that it won't get deployed, because it wasn't correctly installed. The examiner looked incredulous and said that there was no way this could be true. They're always correctly installed. He bent down, looked at the raft, followed the lines with his eyes, and said, "wow, you're right", and gave the teacher (who was along for the test) a piece of his mind. Lucky for me, he forgot to then ask me how it was supposed to be installed.

@herbert633 3 жыл бұрын

@Pouty MacPotatohead It won't inflate the raft. The weak link comes off with it, and thus the rope never gets pulled to inflate the raft. Maybe it could float to the surface if positively buoyant though.

@NikkiTheOtter 3 жыл бұрын

@@herbert633 They are slightly positively buoyant. It's how they float out to the end of the painter in the first place.

@thenasadude6878 2 жыл бұрын

@@NikkiTheOtter someone will have to reach the closed raft, find the painter and pull it by hand, hoping the raft will not hurt you while it deploys. During the day it might not be an extreme challenge, but at night it will be

@dheerajp740 2 жыл бұрын

Thank you bro❤️❤️❤️❤️❤️

@goodshow1579 2 жыл бұрын

Perfect❤️

@donniemontoya9300 3 жыл бұрын

In the Navy I was transiting the Panama canal on a destroyer during a deployment. At a point in the transit, one of the cable cars misjudged the cable length and the side of our ship crashed into the wall of the canal. We crushed and destroyed about 3 of these things when it happened and we all thought they were going to inflate and damage or cause injury.

@Mr3344555 5 жыл бұрын

I love your work! Please do one o steel or metal ships (Pardon my ignorance) vs ships made from wood. If we took a gallion and outfitted it with a shipping ship eng8ne, would it be as efficient, if not more efficient? Thank you for your amazing work friend, and know that you're teaching those who had no interest in sailing but you're making them interested :)

@CasualNavigation 5 жыл бұрын

That sounds like an interesting idea. I'll see if I can work it into a video at some point.

@Mr3344555 5 жыл бұрын

@@CasualNavigation thank you so much! I just read shipping ship engine, oh god the ignorance is strong with me lol

@alanplatt6229 3 жыл бұрын

When I used to audit our company’s vessels, this was the first thing I checked.

@sminthian 3 жыл бұрын

I do inspections on boats, and these are part of it. People put these on upside-down all the time, which means they won't work correctly. Our saying is always "sunny side up", the yellow part goes up.

@audiosurfer9719 Жыл бұрын

A little correction for the last animation. Liferaft never afloats in capsule. It opens underwater and only because of it it is possible to break weak link and get afloat

@daetslovactmandcarry6999 5 жыл бұрын

When I was at _ACACIA,_ we had a raft that was beyond service life. As a training opportunity, we took it to the peir and mostly played with it for a while, pulled the painter and climbed inside, all that crap. It was also the day I discovered how allergic I was to coconuts; Even with the plastic shrink-wrap sealed aluminum foil covered survival food still sealed, I was gagging. 🤣🤣🤣🤣🤣

@revenevan11 4 жыл бұрын

Wow, that's gotta suck (I love coconuts). It's pretty ironic when the survival food starts trying to kill you!

@100GTAGUY 4 жыл бұрын

Is gagging a sign of an allergic reaction? I know it's normal for like rancid or spoiled food, but I've never heard it associated with anaphylaxis.

@daetslovactmandcarry6999 4 жыл бұрын

@@100GTAGUY I just double checked (to be sure I knew what I was talking about), and yes, it's not just a sign of allergies it's a sign of severe and potentially life threatening allergy... 🤯

@ThinkCleverAndSmart 5 жыл бұрын

So will this tube float up to the surface and become a small boat, or? In the video you only showed the tube itself floating up and nothing else happened

@CasualNavigation 5 жыл бұрын

Yes, it would inflate. I haven't managed to make an inflation animation yet though

@ThinkCleverAndSmart 5 жыл бұрын

Ah ok! Thanks!

@hermitoldguy6312 5 жыл бұрын

@Casual Navigation You can use that as an opportunity for comedy. Inflate the raft off-screen, while informing viewers that that's what's happening.

@welshpete12 3 жыл бұрын

I used to crew small sailing ships . We had I think , one , it not been a large ship . But the skipper and owner , was always on about how much the yearly check cost for it.

@JavierCR25 4 жыл бұрын

So many new things I learn watching this channel. Awesome!

@octavmandru9219 3 жыл бұрын

I believe there is missing info: the painter line is actually responible for inflating the life-raft. One fully extended (a good 10m or so), it will activate the self-inflation unit inside the life-raft. The pressure inside shells will break the ribbons closing the unit and the raft inflates. It is very hard for a survivor to do all the above, while in the water

@Halinspark 3 жыл бұрын

2:53

@lemo8986 3 жыл бұрын

Im doing well, thank you

@lemo8986 3 жыл бұрын

people who get the joke will get nothing from me

@toryknotts8026 4 жыл бұрын

I'd like more videos on life rafts and life boats ( the big orange things on cruise ships)

@notj5712 5 жыл бұрын

Seems that weak link would be better on the raft end of the painter. That way if the painter gets caught in the rigging or some other obstruction, the raft still releases.

@EwanMarshall 5 жыл бұрын

Well, you want the painter for throwing to a rescue vessel or pulling another raft to you once you are using the thing. Painter is the rope to the bowl of the boat for towing and tying to a dock.

@notj5712 4 жыл бұрын

@@EwanMarshall Not the one attached to the raft you don't. You're not throwing it to a vessel, it's attached to the raft....

@skippyguy3 4 жыл бұрын

No because the raft would not be left with a painter and make be left un-inflated on the surface...

4 жыл бұрын

Interesting.

@scose 3 жыл бұрын

Would you do a video on enclosed lifeboats, history of lifeboat technology?

@ginog5037 Жыл бұрын

Great video and channel. Question why is that line called the "painter"?

@giannithestud1 5 жыл бұрын

What a fucking genius idea

@PinacoladaMatthew 3 жыл бұрын

Can you do one with non-weak link system (a,k.a float free arrangement with separate painter and inflation operating line?)

@RiggingDoctor 5 жыл бұрын

This is why I have a velaise life raft. If we need it, we deploy it and hop in. No relying on a bunch of gear on a fully rigged deck.

@EwanMarshall 5 жыл бұрын

You can still deploy this manually, that is what the senhouse slip is for, however on a big ship, you don't want to make sure you have released them all manually, and you want the others for their supplies even if you are not directly using them.

@chemistryinstruments7156 3 жыл бұрын

Really interesting even though I don't sail at all

@swapnil7256 5 жыл бұрын

Very good explanation,, can u please do one video on enclosed life boat in details?

@CasualNavigation 5 жыл бұрын

I'll add it to my list. There is a lot to cover with lifeboats, so may cover different parts in different videos

@swapnil7256 5 жыл бұрын

@@CasualNavigation Thank you so much for that

@themissile3120 3 жыл бұрын

So if they're strapped until underwater release, when and how do you get in them?

@RonakDhakan 5 жыл бұрын

What is in the white barrel? What happens in it when the painter is pulled?

@hermitoldguy6312 5 жыл бұрын

What's in the barrel is an inflatable life raft. Pulling the painter fires the gas canister which inflates the raft. (As I understand it, I am not an expert.)

@EwanMarshall 5 жыл бұрын

@@hermitoldguy6312 Pretty accurate. The painter is also left attached to the raft for as a line to pull in the raft when rescued.

@mhk5272 4 жыл бұрын

Great video, but how do you use these rafts

@oliverwalters9533 4 жыл бұрын

They auto inflate and pop out of the plastic shell

@stephenbritton9297 4 жыл бұрын

Senhouse slip? Looks like a Pelican hook to me! Also, I read a report about 15yrs ago by a major P&I club that stated 50% of the life rafts they had inspected in the past year were rigged wrong. (I’m guess it was not actually them do the inspecting, but compiling reports from Port State and Class Society inspections of member ships)

@steny82 5 жыл бұрын

Explain about that color in HRU (yellow and red)

@CasualNavigation 5 жыл бұрын

I believe they are for different activation depths, but do check with the units themselves as I am not completely sure

@fish3977 3 жыл бұрын

I were wondering if it was perhaps similar to water activating life vests that at least used to use salt charges but for something constantly stored outdoors and in contact with rain and splashing that obviously wouldn't have made much sense

@jeffjohnsisland5551 2 жыл бұрын

Some life jackets use the same method of operation-not the salt pill. Look at Mustang Survivals Hammer units. I have the Hammer units on my boat, I don’t like the salt “pill” method, due to deployments when not required and periodic salt pill replacement. Yes, all inflatable life jackets require some maintenance.

@rianpatulak 5 жыл бұрын

Thank you

@CasualNavigation 5 жыл бұрын

Cheers Rian

@romanator30 3 жыл бұрын

Someone told be those are depthbcharges for submaries. Belived it for a while

@Zultchy 4 жыл бұрын

so whats the point of the weak link if it just snaps? The blade cuts the rope. thats all you need? What does the weak link do?

@revenevan11 4 жыл бұрын

The weak link releases the "painter" rope which is still attached to the raft to be used for docking or securing things like other rafts. The painter needs to be held by the weak link at first, until it is pulled enough to inflate the raft. Once that happens the buoyant force is strong enough for the weak link to break, releasing the painter and allowing the raft to float to the surface. Hope this explanation helps!

@jayswarrow1196 4 жыл бұрын

That's a funny irony, but i actually do an amateur "inspection" of safety equipment on my deck, after placing myself in cabin. (mainly because it gives me a reason to stroll the walks)

@jeffjohnsisland5551 2 жыл бұрын

@Jay Swarrow very smart to check the safety equipment yourself. I wouldn’t be surprised if you found problems occasionally.

@chrisonkitebe7959 3 жыл бұрын

How is the weak link work ?

@notmenotme614 3 жыл бұрын

In rough seas what’s to stop big waves washing over the deck from triggering the HRU?

@jordanrodrigues8265 3 жыл бұрын

Like he said, an HRU doesn't detect water, only water pressure. The HRU must sink below the surface (by several meters) in order to release the rafts. If a raft is positioned at the bow and driven into a very large wave, there's some possibility that a standard HRU could activate. But it takes more than an awash deck - the HRU needs to be solidly buried in a mountain of water. The risk of a raft sinking with the ship is much greater than the risk of losing a raft to heavy seas. That's why HRUs are required on almost every raft.

@rohitnehra9519 5 жыл бұрын

But how to get inside of that?

@oliverwalters9533 4 жыл бұрын

They auto inflate and pop out of the plastic shell

@xciimani7513 2 жыл бұрын

I really like the fact but you should really stress if the painter should pass in front or behind the cradle bar because right now... you have it passing inside the bar..

@_Raven_ 4 жыл бұрын

That is genius

@freddyfox5002 3 жыл бұрын

What are odds of getting to one of does after you boat has gone down. How long would it take? A big cruiser could take a while to go under.

@reallyhappenings5597 3 жыл бұрын

If you've got that kind of time you release it manually before the deck is awash.

@colorred5383 3 жыл бұрын

I'm good, thanks! And How r u?

@PaprikaYT 4 жыл бұрын

This dude navals

@imperialguardsman4361 4 жыл бұрын

Is a similar method used to release EPIRBs?

@namechamps 4 жыл бұрын

Yes works exactly the same way and a single company (Hammar) makes the vast majority of HRU for both liferafts and EPIRBs.

@100GTAGUY 4 жыл бұрын

@@namechamps I wanna say they also make ELTs (or emergency location transmitters) for aircraft

@jacobgibbs8133 3 жыл бұрын

Wait what’s the point of the weak link?

@jacobgibbs8133 3 жыл бұрын

As in, what’s the point of having the painter to hold the raft to the vessel?

@6yjjk 3 жыл бұрын

It needs to hang onto the painter (rope) for long enough that the canister floating upward pulls on it to inflate the raft, but then it must fail in order for the raft to come to the surface. It'll be engineered to fail at a specific force to achieve this. Weak links are common where you want things to fail in a predictable way. In gliding, for example, there's always a weak link in the launch cable so that (say) an over-enthusiastic winch driver doesn't rip a chunk out of the glider or snap the cable.

@sarthakjena7521 5 жыл бұрын

Sir plz explain what is difference between liferaft HRU and Epirb HRU?

@CasualNavigation 5 жыл бұрын

The actual HRU is the same. The difference just comes from the release mechanism. Liferaft ones cut the link, and epirb ones will cut the case free

@sarthakjena7521 5 жыл бұрын

Thank you...☺️☺️

@amavic1 5 жыл бұрын

@@CasualNavigationsorry you are misinformed HRU (Hydrostatic Release Unit......) EPIRB (Emergency Position Indicating Radio Beacon) so it's not the same

@DaveCo1985 5 жыл бұрын

Hi Armadito, the question relates to the differences between the HRUs used in the life raft and on the EPIRB respectively.

@CharlieK92004 5 жыл бұрын

@@amavic1 , how does that shoe leather taste.

@RamyFal 4 жыл бұрын

What are these things ??

@mohammadal-kamsha4020 5 жыл бұрын

Wait what? We survive in this holes tube???

@damnedmadman 3 жыл бұрын

I always wonder what would happen if the boat capsized 180 degrees before sinking, or if the boat sank in a shallow water, like 3 meters deep 🤔

@jfnotk255 3 жыл бұрын

1. Let's hope you can release them early enough manually. 2. If the water is so shallow, hopefully enough of the boat raises out of the water. But yes, I have the same question, how much pressure do these need to release?

@tylerrjohnson68 4 жыл бұрын

So, do people get inside of them? Because I didn't see that illustration

@budisutanto5987 3 жыл бұрын

Painter = orange rope Weak link = red square with hole Inside white tube is a raft. The raft isn't inflate yet in nonemergency situation. Under water, painter under tension inflate the raft. So . . people doesn't get inside the white tube. The white tube is push open by the inflate raft. The fragmented white tube is discarded. On the surface, people climb on the fully inflate raft.

@kennethcoenen7643 4 жыл бұрын

Shouldn't the painter be equipped with a manual quick release aswell? If you manually release the raft and inflate it, the painter is still attached to the sinking boot via the weak link. The raft will get pulled under untill the weak link breaks. Or is the weak link breakable by a human pulling on it? It seems that it needs to be strong enough to hold the raft down during a storm, so maybe a person pulling at it won't break it.

@budisutanto5987 3 жыл бұрын

The raft isn't being hold by weak link. The raft is being hold by yellow rope. The yellow rope is a loop. The weak link is attached to yellow rope. The weak link can be design to attached to the ship. But what for? There's no need to move the weak link.

@jfnotk255 3 жыл бұрын

Maybe a human can not, but a inflated raft should, without being pulled under water. But the graphic is wrong. The rope is not only connected to the weak link but also to the HRU. Should be only tired around the upper bar of the weak link.

@dawidwalicki3443 2 жыл бұрын

not all hydrostatic relese work as you show it, some are mechanical that does not cut the rope but relese some latch

@jerematthewjohnson223 5 жыл бұрын

11 to davy jones locker

@aquilesbayonito9366 Жыл бұрын

We are taught about this by our instructors in s.o.l.a.s. before we are awarded our certificates.

@roseannebobe8109 2 жыл бұрын

wheres the raft part?

@rafaelc5102 3 жыл бұрын

But How does It get opened?

@budisutanto5987 3 жыл бұрын

Painter & weak link.

@kinangeagle133 4 жыл бұрын

I thought this was about the gas tanks underneath petrol stations

@MrMichkov 5 жыл бұрын

What happens if the water is too shallow to trigger the mechanism?

@swisstraeng 4 жыл бұрын

Then would you need a lifboat? If it's shallow there's likely earth nearby. Otherwise, if you're really unlucky, the boat would not sink still, since the water is shallow. It'd just hit the bottom, and maybe sink halfway.

@MrMichkov 4 жыл бұрын

Any water with a depth of lower than your height is dangerous to you. People have manage to drown in puddles after all.

@Halinspark 3 жыл бұрын

@@MrMichkov If the water is so shallow it won't activate the mechanism, then it's so shallow that you can do it yourself.

@jimsvideos7201 4 жыл бұрын

...Vut are you sinking about?

@usualsuspect5173 5 жыл бұрын

How do you use these " rafts ?"

@hermitoldguy6312 5 жыл бұрын

You swim to it, and climb in.

@swisstraeng 4 жыл бұрын

They deploy automatically when they are in the water.

@cr4zyj4ck 4 жыл бұрын

Inside the hard plastic shell is a fully equipped inflatable life raft. Pulling on the painter opens a stored canister of compressed gas, likely carbon dioxide, that inflates the raft stored inside. As the raft inflates, it discards its outer plastic shell and floats up to the surface.