|
|
07-10-2018, 17:24
|
#1
|
Registered User
Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 8,462
|
Freak Waves
We have talked about these before but I just watched an amazing video on freak waves.
|
|
|
07-10-2018, 18:18
|
#2
|
Senior Cruiser
Join Date: Dec 2008
Location: Between Caribbean and Canada
Boat: Murray 33-Chouette & Pape Steelmaid-44-Safara-both steel cutters
Posts: 8,508
|
Re: Freak Waves
Cheery.
|
|
|
07-10-2018, 19:14
|
#4
|
Moderator
Join Date: Sep 2014
Location: Channel Islands, CA
Boat: 1962 Columbia 29 MK 1 #37
Posts: 14,305
|
Re: Freak Waves
That's it! I am never going sailing again!
Good stuff DeepFreeze! Very interesting.
__________________
DL
Pythagoras
1962 Columbia 29 MKI #37
|
|
|
07-10-2018, 19:25
|
#5
|
Registered User
Join Date: Jul 2012
Location: Hobart
Boat: Alloy Peterson 40
Posts: 3,919
|
Re: Freak Waves
Quote:
Originally Posted by billknny
|
As always from AAC, it a very good article, and it basically says Rogue or freak waves are an integral part of storm managment. Not a freak event as many people tend to think. The possiblity of a rogue wave needs to be managed somehow, not ignored, or left to blind luck.
|
|
|
07-10-2018, 19:40
|
#6
|
Registered User
Join Date: Aug 2011
Location: Melbourne Australia
Boat: Paper Tiger 14 foot, Gemini 105MC 34 foot Catamaran Hull no 825
Posts: 2,912
|
Re: Freak Waves
I found crossing ocean currents, Which are clearly marked on my GPS,
Are about 4 miles or so wide,
When you also cross a big change in the ocean floor, Which is also clearly marked on my GPS,
I got huge waves that stood up out of nowhere, and then just dissapeared back into the ocean,
Yes I did take piccys of them, But it is hard to distinguish them on film,
Two that stood up vertically on my transom, were both 12 metres tall,
The wave height was the same as my top spreader,Which is 10 metres off my deck,
Add two metres for my deck to water line, Made them at 12 metres in height,
The following waves to my boat were coming straight at my transom, The big waves were about 30 degrees off the rear, one filled my cockpit with water, then the big one stood up straight behind it,
I do know the power of water, These huge waves are at least 100,000 tons,
If it lands on my boat, I am dead, It would smash my boat to confetti,
These huge waves take out the covers on container ships, So I wont have a chance to survive it,
Fortunately for me, My boat popped out from under it at the last moment,
I was very cool calm and collected, Knowing I was going to be very dead within the next 3 minutes, And not a damned thing I could do about it, Except watch it happen,
|
|
|
07-10-2018, 19:44
|
#7
|
Registered User
Join Date: Feb 2013
Location: Bumping around the Caribbean
Boat: Valiant 40
Posts: 4,625
|
Freak Waves
Freak waves may be real but the video is utter sensationalist trash. You basically have a small handful of “eyewitnesses” saying “It was 90’ feet tall!” And as mentioned they are akin to fish stories. It may have looked that big. And of course the tellers survived to then be interviewed. It’s right up there with alien abductions, ghost stories, and Bigfoot. Don’t forget in the video they labeled freak waves to be considered “a myth”. Why are things considered myths? Because there is zero corroborating evidence.
The shipping industry is not stupid. It’s numbers driven like most industries. If ships are designed for a specific maximum wave height it’s because anything beyond that is so statistically rare that it is ignored in design parameters.
I’m not dismissing freak/rogue waves, just the video and what it’s trying to accomplish which is views through sensationalism. It’s the maritime equivalent of warnings regarding massive asteroids hitting earth.
__________________
"Having a yacht is reason for being more cheerful than most." -Kurt Vonnegut
|
|
|
07-10-2018, 19:56
|
#8
|
Moderator
Join Date: Sep 2014
Location: Channel Islands, CA
Boat: 1962 Columbia 29 MK 1 #37
Posts: 14,305
|
Re: Freak Waves
Yeah but it was those radar images that are hard to argue with. What I am curious about which was not really discussed is how long the waves last, which the Schrodinger guy didn't mention, unless I missed it. The only one I have seen which was from the air, and I do not know how much greater it was than the surrounding waves, but 3x is possible, was, I am guessing, about a quarter mile across the face, it was breaking and it lasted no more than a minute, probably less.
__________________
DL
Pythagoras
1962 Columbia 29 MKI #37
|
|
|
07-10-2018, 20:29
|
#9
|
Senior Cruiser
Join Date: May 2013
Location: Oregon to Alaska
Boat: Wheeler Shipyard 83' ex USCG
Posts: 3,499
|
Re: Freak Waves
Rogue waves can maintain their height and force over miles. When I was commercial fishing and a rogue passed, boats ten or twenty miles downwind could be hit later and we passed on warnings on the radio. Off the Cape of Good Hope rogue waves can go 100 miles or more. When I was a fisherman the scientists and mathematicians were still explaining how rogue waves couldn't exist. Maybe the reason why I don't believe some of the nonsense scientists preach now.
|
|
|
07-10-2018, 20:40
|
#10
|
Registered User
Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 8,462
|
Re: Freak Waves
The video seemed pretty credible to me. Backed up by science, satellite radar, radar mounted on drilling rigs, actual accident reports and eye witness reports from experienced senior officers that have spent way more time at sea than I.
|
|
|
07-10-2018, 20:52
|
#11
|
Moderator
Join Date: Sep 2014
Location: Channel Islands, CA
Boat: 1962 Columbia 29 MK 1 #37
Posts: 14,305
|
Re: Freak Waves
Well if I might speak up for scientists, the real ones are always open to new ideas and explanations as long as they come with some evidence and data... now with the satellite radar data that helps a lot.
__________________
DL
Pythagoras
1962 Columbia 29 MKI #37
|
|
|
08-10-2018, 05:58
|
#12
|
Registered User
Join Date: Feb 2013
Location: Bumping around the Caribbean
Boat: Valiant 40
Posts: 4,625
|
Re: Freak Waves
Ok so I made the cardinal mistake of quitting the video 1/3 through thinking it was going to be nothing but endless anecdotal accounts and reconstructions, sans science.
I think the quantum model, of unstable waves and energy transfer and accumulation is really interesting and well presented so I’m give the video a break. Apologies for my prior uninformed rant.
__________________
"Having a yacht is reason for being more cheerful than most." -Kurt Vonnegut
|
|
|
08-10-2018, 07:31
|
#13
|
Registered User
Join Date: Aug 2010
Location: Anacortes, WA
Boat: 55' Romsdal
Posts: 2,103
|
Re: Freak Waves
Quote:
Originally Posted by Mr B
I found crossing ocean currents, Which are clearly marked on my GPS,
Are about 4 miles or so wide,
When you also cross a big change in the ocean floor, Which is also clearly marked on my GPS,
I got huge waves that stood up out of nowhere, and then just dissapeared back into the ocean,
Yes I did take piccys of them, But it is hard to distinguish them on film,
Two that stood up vertically on my transom, were both 12 metres tall,
The wave height was the same as my top spreader,Which is 10 metres off my deck,
Add two metres for my deck to water line, Made them at 12 metres in height,
The following waves to my boat were coming straight at my transom, The big waves were about 30 degrees off the rear, one filled my cockpit with water, then the big one stood up straight behind it,
I do know the power of water, These huge waves are at least 100,000 tons,
If it lands on my boat, I am dead, It would smash my boat to confetti,
These huge waves take out the covers on container ships, So I wont have a chance to survive it,
Fortunately for me, My boat popped out from under it at the last moment,
I was very cool calm and collected, Knowing I was going to be very dead within the next 3 minutes, And not a damned thing I could do about it, Except watch it happen,
|
Sea mounts, even when the water depth over them is significant, need to be transited with caution. A very common feature all around the Pacific rim.
|
|
|
08-10-2018, 07:42
|
#14
|
cruiser
Join Date: Nov 2007
Location: Probably in an anchorage or a boatyard..
Boat: Ebbtide 33' steel cutter
Posts: 5,030
|
Re: Freak Waves
Quote:
Originally Posted by Snowpetrel
As always from AAC, it a very good article, and it basically says Rogue or freak waves are an integral part of storm managment. Not a freak event as many people tend to think. The possiblity of a rogue wave needs to be managed somehow, not ignored, or left to blind luck.
|
Similar non linear weird things happen in fibre optics as well >
https://en.wikipedia.org/wiki/Optical_rogue_waves
Quote:
These anomalous events have been shown to follow heavy-tailed statistics, also known as L-shaped statistics, fat-tailed statistics, or extreme-value statistics.[1][2] These probability distributions are characterized by long tails: large outliers occur rarely, yet much more frequently than expected from Gaussian statistics and intuition. Such distributions also describe the probabilities of freak ocean waves[3][4][5] and various phenomena in both the man-made and natural worlds.[6][7][8][9][10][11]
|
|
|
|
08-10-2018, 08:25
|
#15
|
cruiser
Join Date: Jan 2017
Boat: Retired from CF
Posts: 13,317
|
Re: Freak Waves
Ultimately we do take our chances.
"Somehow manage" is a pipe dream for Mother Nature's more outlier phenomena.
We are part of her, and in the end just as subject to her whims as any other of her organisms.
|
|
|
|
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Rate This Thread |
Linear Mode
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Advertise Here
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
Vendor Spotlight |
|
|
|
|