VERY lucky fishermen!

[Sans Bateau]

http://www.bbc.co.uk/news/uk-northern-ireland-20125988

 

[z1ppy]

scary isnt it!

bet he thought his number was up when he got dragged down at the end!!

Very Lucky and scary how quick it went down!

 

[stuartwineberg]

Liferafts

Again, I am sure it is my lack of technical know how but I thought that on commercial shipping liferafts were fitted with an automatic inflation mechanism. I noticed both valises floating in the water unopened.

That said I now recall that the mechanism releases the liferaft from the boat for manual inflation from the water - am I right?

 

[single]

Liferaft didn't deploy then. Lucky chaps and lucky another trawler was close by.

 

[prv]

That said I now recall that the mechanism releases the liferaft from the boat for manual inflation from the water - am I right?

No.

The hydrostatic release cuts through a line which forms part of the lashing, so the cannister can escape up to the surface. The painter is attached via a plastic weak link (comes with the hydrostatic) and remains attached to the boat. So the painter is pulled out as the cannister rises. Once the boat sinks to the full length of the painter, the raft inflates. The inflated raft has too much buoyancy to be pulled underwater, so the weak link breaks, releasing it from the boat.

The line which the hydrostatic cuts is a loop that passes through the weak link. So until the hydrostatic goes off the weak link is not weak. This ensures the raft (if released manually, for example) can't escape from a boat that is still afloat. In that case you'd cut the painter to get away.

The video ends before the boat is likely to have sunk far enough to pull out the whole painter. So we don't know whether the rafts worked or not.

Pete

 

[Zagato]

Horrible to watch They were lucky...

 

[Sans Bateau]

No.

The hydrostatic release cuts through a line which forms part of the lashing, so the cannister can escape up to the surface. The painter is attached via a plastic weak link (comes with the hydrostatic) and remains attached to the boat. So the painter is pulled out as the cannister rises. Once the boat sinks to the full length of the painter, the raft inflates. The inflated raft has too much buoyancy to be pulled underwater, so the weak link breaks, releasing it from the boat.

The line which the hydrostatic cuts is a loop that passes through the weak link. So until the hydrostatic goes off the weak link is not weak. This ensures the raft (if released manually, for example) can't escape from a boat that is still afloat. In that case you'd cut the painter to get away.

The video ends before the boat is likely to have sunk far enough to pull out the whole painter. So we don't know whether the rafts worked or not.

Pete

So what happens if the water isnt deep enough to pull the painter, but is deep enough to drown in?

 

[prv]

So what happens if the water isnt deep enough to pull the painter, but is deep enough to drown in?

You pull the painter by hand.

What you don't want is the liferaft inflating into a big snaggy mess while it still has to ascend past the sailing rig / trawl gear / radar arch. A slippery streamlined cannister will probably make it past without getting caught.

Stavros has a maximum complement of 62 but carries liferafts for 200 because the regulations for square rigged ships assume that in the event of sinking some of the rafts may get caught in the extensive rigging.

Pete