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08 February 2021, 15:34
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#1
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Member
Country: UK - England
Town: St Albans
Boat name: Restless Too
Make: BRIG
Length: 10m +
Engine: 2 x Suzuki 350hp
Join Date: Feb 2021
Posts: 18
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Wave Speed
Can anyone tell me how fast waves travel?
JD
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08 February 2021, 17:45
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#2
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Member
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 7,454
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Depends on wind speed 30-40 mph common sismic waves 470 mph
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08 February 2021, 17:53
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#3
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Member
Country: UK - England
Town: Fareham
Boat name: Red Dog
Make: Porters Renegade
Length: 6m +
Engine: 150 HP Yamaha
Join Date: May 2010
Posts: 605
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Quote:
Originally Posted by jeffstevens763@g
Depends on wind speed 30-40 mph common sismic waves 470 mph
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Please tell me that's a typo or I may never take the boat again?
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08 February 2021, 19:18
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#4
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Member
Country: UK - England
Town: Wild West
Boat name: No Boat
Make: No Boat
Length: under 3m
Join Date: Jan 2008
Posts: 5,304
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Quote:
Originally Posted by Wightdiver
Please tell me that's a typo or I may never take the boat again?
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I think it was a typo  
Although ...lIm pretty sure "wave speeds" dont so easily equate so much with wind speeds  .....thankfully!
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A clever Man learns by his mistakes..
A Wise Man learns by other people's!
The Road to HELL ..is Paved with "Good inventions!"
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08 February 2021, 19:22
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#5
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RIBnet supporter
Country: UK - Isle of Man
Town: Peel, IOM
Length: no boat
Join Date: Nov 2000
Posts: 2,511
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Waves don't "travel" at all.
They merely move and down.
"Waves are created by energy passing through water, causing it to move in a circular motion. The ocean is never still. Whether observing from the beach or a boat, we expect to see waves on the horizon. Waves are created by energy passing through water, causing it to move in a circular motion."-Prof. Google
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Brian
"Ribbing-the most expensive way of travelling third class"
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08 February 2021, 19:24
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#6
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Member
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 7,454
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Sorry seismic and can reach 600 mph mid Pacific
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08 February 2021, 21:16
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#7
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Member
Country: UK - England
Town: Fareham
Boat name: Red Dog
Make: Porters Renegade
Length: 6m +
Engine: 150 HP Yamaha
Join Date: May 2010
Posts: 605
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Quote:
Originally Posted by jeffstevens763@g
Sorry seismic and can reach 600 mph mid Pacific
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600 MPH, it gets worse!!! Although the Pacific is a fair distance from the Solent so I wont worry too much.
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08 February 2021, 21:29
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#8
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Member
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Excel 435
Length: 4m +
Engine: Suzuki Outboard/25/4
Join Date: Oct 2011
Posts: 7,454
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e
Quote:
Originally Posted by Wightdiver
600 MPH, it gets worse!!! Although the Pacific is a fair distance from the Solent so I wont worry too much.
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itd be a hell of a trip back surfing the wave in you're rib 
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08 February 2021, 21:44
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#9
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Member
Country: UK - England
Town: Nottinghamshire
Make: Ranieri 15
Length: 4m +
Engine: Suzuki DF50
Join Date: Jul 2016
Posts: 1,279
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Don't search 'rogue waves' or 'freak waves' on YouTube.
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09 February 2021, 09:15
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#10
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Member
Country: UK - England
Town: Fareham
Boat name: Red Dog
Make: Porters Renegade
Length: 6m +
Engine: 150 HP Yamaha
Join Date: May 2010
Posts: 605
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Quote:
Originally Posted by Limecc
Don't search 'rogue waves' or 'freak waves' on YouTube.
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Darn, why did you have to say that!!!!!
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10 February 2021, 17:58
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#11
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Member
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 100hp Yam/150hp opt
Join Date: Sep 2003
Posts: 2,069
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I used to know this when doing my Naval Architecture degree many years ago. Long forgotten however.
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10 February 2021, 19:40
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#12
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Member
Country: Canada
Town: st. john's, Newfoundland
Boat name: TBD
Make: Zodiac Hurricane 530
Length: 5m +
Engine: MERC 75HP 4S
Join Date: Aug 2011
Posts: 64
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A wave with a significant wave height of 1.2m (.9m average, 2m max) travels through the water at about 21kph(water does not actually move...much)
At significant wave height of 2.5 (1.5m average, 5m max)goes up to 28kph
These are waves most representative of what you see in a Small rib/sib.
A deep water wave moving at 600mph would have such a long wavelength compared to its height that you would not event notice it. What you notice, and what is dangerous, is wave steepness compared to its height. It would be a very very very loooong swell.
A wave breaks when it’s height to length ratio is greater than 1/7.
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15 February 2021, 10:12
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#13
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Member
Country: UK - England
Town: PORTSMOUTH
Make: Avon 5.4, Avon 3.4,
Length: 5m +
Engine: Yamaha 90, Merc 30
Join Date: Sep 2003
Posts: 1,976
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I do a fair bit of surfing of my local break, I track my distance and wave tracks using my garmin gps watch, actual wave speed when ive caugh a wave, Ive found is around 15 to 20ish mph on average
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15 February 2021, 10:31
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#14
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Member
Country: UK - England
Town: St Albans
Boat name: Restless Too
Make: BRIG
Length: 10m +
Engine: 2 x Suzuki 350hp
Join Date: Feb 2021
Posts: 18
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Brilliant - thanks!
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spy-sea-one
RIB Saffron
War Shot
