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Old 22 August 2009, 05:29   #21
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Originally Posted by SeaSkills View Post
It's not quite that simple. You can cope with large waves relatively comfortably if the distance between them is great enough and you have a big enough boat. It's when the wavelength shortens and the angle of slope becomes steeper that large waves become more of a problem, and the problem comes to the smaller boats first. Generally speaking, size does matter here

The biggest problem comes from breaking waves. As the wave breaks it releases considerable amounts of energy. As a very simple rule of thumb, if a breaking wave has a height about the same as the beam of your boat it is more than capable of rolling you over. Even big boats get knocked down by breaking waves.

There is a bit of a foolish myth amongst some people that RIBs have such fantastic seakeeping abilities that you can do anything you like. Obviously that is not true - failing to respect the sea always leads to problems in the long run.

There is a lot of good advice on this forum, but the best advice is just not to be there ... especially to keep away from breaking water.
Very true! When I was out in the surf, i was not too concerned, i Slowed to about 10-10 knots to look down and check the plotter for hazards, while heading up weather a breaking wave turned the boat sideways and threw it hard enough i head butted the throttle to almost WOT!! That was my wake up call!!!!

Unlike my situation I think there will be times when pressing on IS the only option, for eg if the nearest safe haven is 2 miles infront V 15miles back the way you came??? and I still not sure i would know what to do to get her through it. My boat is very capable, im a average driver, in general I know my limits, i plan a course and weather, i understand throttle and trim control BUT still not sure how to handle large but short breaking waves

Windfinder showed me that the frequency of the waves were 2to3 seconds appart, with the wind heaping them up!!! PS BEST weather web site ive ever found
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Old 22 August 2009, 06:34   #22
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Gtflash,

Have a read through this:

http://www.docksidereports.com/rough...amanship_1.htm

Parts 1, 2, and 3.

Cheers,

rupert.
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Old 22 August 2009, 07:09   #23
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Very true. I think most RIBs can take more than their owners can though.
As I found out!!
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Old 22 August 2009, 07:14   #24
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As I found out!!
Yeah but I think you'll be a better helm for it
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Old 22 August 2009, 07:23   #25
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Yeah but I think you'll be a better helm for it


Certainly more safety conscious.
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Old 22 August 2009, 08:58   #26
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Have a look at some of these videos - quite instructional and damn good boats as well.



http://www.youtube.com/profile?user=...at&view=videos
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Old 22 August 2009, 09:05   #27
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Yes,

One of my favourite boats. Cost, used, Cod?
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Old 22 August 2009, 09:11   #28
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Another naive question

Someone has commented on how length of the boat matters, but I was just wondering how important the size of tubes and weight of the boat are in rough water handling. Anyone care to give a bit more info?
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Old 22 August 2009, 09:24   #29
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Think hull shape has quite a bit to do with it too.
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Old 22 August 2009, 10:16   #30
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Someone has commented on how length of the boat matters, but I was just wondering how important the size of tubes and weight of the boat are in rough water handling. Anyone care to give a bit more info?
diamiter of tubes/ sponsons do make a great difference even by just a few inches , and a lot is to do with if you are in broken water /surf /large swells or your taking a greenie over the side . going on the weight side in the extreame if your r.i.b does get totally swamped in big waves the whole stability factor kicks in ,have you a powerfull enough engine to keep moving and hope the water sloshes out over the transom or are the bailers /trunks man enough to cope with the amount of water whilst you can gain some control until the next big wave hits you picks you up and you broach or tip over ,even though it wont sink ribs are fine but full of water and the stability is greatly reduced .
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