A question

[lastdingo]

Hello, I'm new here and I've already got a question. *surprise*

I'm doing some personal research on speed boats and ran in trouble with language.

How are those boats called that can move through waves (high sea states, obviously) instead of riding on them / jumping around (obviously, fully canopied monohulls)?

Key words would already suffice. I just don't know the English terminology.


Thanks in advance.

[BHOFM]

Displacement hulls?

[Luckless]

You mean wave piercing boats? The ones where the nose is designed to cut into the wave and 'dive' through the wave, rather than running up the wave and down the back?

Nasty things to actually ride in from what I've heard.

[Paul aka watertaxi]

Think Luckless has it with wavepeircers, but maybe also VSV boats?

[lastdingo]

Originally Posted by Luckless

You mean wave piercing boats? The ones where the nose is designed to cut into the wave and 'dive' through the wave, rather than running up the wave and down the back?

Nasty things to actually ride in from what I've heard.

That seems to be the right term.

Some military boats and the bio-diesel show boat Earthrace seem to use the wave piercing concept.

Such boats probably disappear from radar screens in higher sea states...

edit: It seems as if I didn't find the term on my own because it's also used for ships and boats that rather cut through waves with a very sharp, horizontal bow (basically the old clipper idea) than to dive through them.

The SBS is rumoured to use wave-piercing boats (vsv 16 and vsv 22), but again, the dual use of the term (and lack of photos due to secrecy) leaves doubts.

First things first;
Hello, I'm new here and I've already got a question. *surprise*

I'm doing some personal research on speed boats and ran in(to) trouble with (your/the)language.

(What) are those boats called that can move through waves (high sea states, obviously) instead of riding on them / jumping around (obviously, fully canopied monohulls)?

Key words would already suffice. I just don't know the English terminology.


Thanks in advance.
Your English is better than most native speakers...

I believe that you may be talking about SWATH...

[lastdingo]

I would have known about the "into" on a better day.


SWATH wasn't what I meant. I recall a video of a boat (comparable in size to a racing boat) that really moved frontally into a large wave and left it at the other side.


Navies have become worried about small boats since the Cole attack. A major USN exercise in 2002 had a red team that used speed boat swarms as well, apparently with disastrous (simulated) results for the navy.
Maybe you recall that there has been some talk about Iranian speed boats as a threat to large warships for years?

I was involved in a discussion about these boats and someone mentioned that they're simply too slow at high sea states. Well, a wave piercing boat would probably not need to be fast (faster than 30 kts) simply because it would ride below the wave crest and therefore be hidden from the ship's sensors until, well, very late.

I learned about the SBS's alleged use of such boats and that added to the suspicion that such speed boats might indeed be relevant even at high sea state.


Even something as simple as a google search is fruitless if you've got no good keyword...

[masalai]

"Wave-piercing" in google would have answered your question, giving 4 examples on the first hit in Wikipedia, and lots of other links....

[Guest62110524]

it all boils down(Englsh Idiom) to the entry really
The English had a patrol boat called the Brave class, these under 30m, gas turbine craft often escorted the offshore powerboat races of the 1960,s
A boat can still leap from wave top to wave top and land softly
I built a small vs of such a boat, deep vee only 7m and nothing could keep up with it
Unfortunate but true, when people by a cruiser, powerboat, yacht , call it what you will, at a boat show, they look at the curtains and the glossy finish first, , unless they do know boats they take little notice of the bottom of the boat
Consequently when the family go for the first cruise out to sea, they all come home with broken spines
The Brit designer Don Sheed is a master of go fast power raceboats and yachts
Often I see 2 mill yachts on our coast here in Au, stuck in port, because of the sea state, which is not really rough, it is just that the boat bottoms are poor, hard riding
Where in De. are you?
Stu

[Ad Hoc]

Lastdingo

Boats or rather hulls and how they perform can be defines in to 3 main categories:

1) Displacement
2) semi-displacement
3) Planing.

The term "Wavepiercing" is actually bit of a misnomer. It is very clever marketing that conjures up an image of a hull piercing the waves and hence, must be no motion!..wrong.

All boats are "moved" by waves, to what degree depends upon several factors.

So, if you're moving "through a wave" you're in cat 1) and 2), if you're riding (ie on top to to speak) them its a cat 3) boat.

Do you have a term in German to describe what exactly you are looking for?
Dann sag es.

Regards
Richard