anchoring in deep waters

[issac82]

can anybody guide me which type of anchor or sinker is better to hold a boat around 200tons in watwers of around 150m depth?

[masalai]

This begs a stupid answer - one that floats?... but seriously if your 200 ton boat is inadequately fitted out for such, then maybe it is inappropriate? for me to have answered.... Hope someone comes along to help you resolve your conundrum...

[mydauphin]

A big Anchor

[masalai]

and a chain with a looooong rope (rope end attached to the boat?)

[Frosty]

I feel the same as you guys. Is this a joke.

Go one then Ille bite. A boat your size will have an anchor made for it. It is on the bow or in ahole in the side. using this one would be appropriate.

For 150 meter you would need half a kilometer of chain. At least.

150 meter of chain and an anchor will be a lot of wieght on your winching gear.

Normally you would not anchor in such depths but go for something like 15 meter.

If you don't know how to anchor a 200 ton boat what are you doing with one

[wardd]

you wouldn't need much chain if you sank the boat

[peter radclyffe]

Originally Posted by issac82

can anybody guide me which type of anchor or sinker is better to hold a boat around 200tons in watwers of around 150m depth?

you need a very powerful winch, to pull twice the weight of chain you have out

[masalai]

as I said before, a floating anchor and now to add - a sinking boat...

[apex1]

The weight of the boat in tonnes is the weight of the anchor in Kg, the chain is sufficient if three times the depth, perfect if four times. If chain only, and at 200 tonnes it IS chain only, no ropes. Anchoring on 150 meter depth is idiotic, so you can skimp on the chain calculation. But move the boat closer to shore, there it could make sense to calculate the chain.

Good luck
Richard

[masalai]

Gee apex, and we were just warming up for a bit of sarcastic "fun"

[peter radclyffe]

Originally Posted by apex1

The weight of the boat in tonnes is the weight of the anchor in Kg, the chain is sufficient if three times the depth, perfect if four times. If chain only, and at 200 tonnes it IS chain only, no ropes. Anchoring on 150 meter depth is idiotic, so you can skimp on the chain calculation. But move the boat closer to shore, there it could make sense to calculate the chain.

Good luck
Richard

at what tonnage does this start

[apex1]

What Peter?

Mas. read between the lines, I am from the north, sarcasm is a decent one there!

[Frosty]

[Weight of the boat in tons is the weight of the anchor in KG.]

Mmmm let me sit down and think about that for a minute.

lets see now my boat is 14 tons --so that 14KG----14KG??????

Thats 28 pounds ????? Hmmm

[apex1]

Not toys Frosty, boats! And I only apply that rule from about 50 tonnes up to approx 250. Above we have a lower, beneath a higher percentage.

[marshmat]

And rightly so, Richard.... by the "1 kg/t" rule, my runabout should be able to hold just fine on an anchor about the size of a large coffee mug

Isaac, "mydauphin" got it right off the bat- you need a big anchor.

How big? Well, there's a reason no anchor manufacturer provides standard recommendations for boats this big. Above 100 tonnes or so, you start encroaching on the turf of a large, lumbering animal known as a "Classification Society". If you're going to play on their turf, you're expected to play by their rules- thousands and thousands of pages of rules. Rules to cover just about everything. Including anchors.