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Freak waves
I've run across this picture a couple places on the net and am
wondering if it is real or a digital paste up. http://www.smh.com.au/ffximage/2004/...b__430x275.jpg If real, it is very spooky because of the relatively benign conditions around it. You would expect something like this in a well developed major storm but not in the general sea state shown. It doesn't look like a breaking shoal. If these things do exist, they must be exceedingly rare and this must be one of the luckiest pictures ever taken. I'm guessing this is a digital fake. -- Roger Long |
Freak waves
On Tue, 31 Jan 2006 01:46:33 GMT, "Roger Long"
wrote: I've run across this picture a couple places on the net and am wondering if it is real or a digital paste up. http://www.smh.com.au/ffximage/2004/...b__430x275.jpg If real, it is very spooky because of the relatively benign conditions around it. You would expect something like this in a well developed major storm but not in the general sea state shown. It doesn't look like a breaking shoal. If these things do exist, they must be exceedingly rare and this must be one of the luckiest pictures ever taken. I'm guessing this is a digital fake. If so, here's another one from today's NY Times: http://travel.nytimes.com/pages/travel/index.html The surrounding water looks even flatter. Here's some mo http://tinyurl.com/av3gv http://tinyurl.com/8mb4e |
Freak waves
But, those are shoreline breaks. One of the articles in which that
picture appeared indicated that it was occurring in deep water and that this the kind of thing you could encounter offshore. I've seen a 100 foot schooner stick her bow out into the trough in front of a freak sea so there was air under the keel back to the foremast. A few seconds later, only the two masts were above water as she dove through the wave. I have some idea what can happen offshore put proof (if indeed this is) that such waves can occur when there is not already some pretty significant seas would be new to me. -- Roger Long "Wayne.B" wrote If so, here's another one from today's NY Times: http://travel.nytimes.com/pages/travel/index.html The surrounding water looks even flatter. Here's some mo http://tinyurl.com/av3gv http://tinyurl.com/8mb4e |
Freak waves
Hi Roger,
I'm guessing its a fake photo......however, do a google search for "Cortes Bank". Its an underwater ridge approx 100 mile offshore from San Diego which rises to within a few feet of the surface at spots and when the conditions are right produces really huge waves. In recent years "extreme" surfers have organized trips to the site to ride the waves, which move much faster than the surfers can paddle, so they use jetskis to tow them up to speed necessary to catch the wave. It could be the photo was taken at Cortes bank....anyway its an interesting read. Rich A. Roger Long wrote: I've run across this picture a couple places on the net and am wondering if it is real or a digital paste up. http://www.smh.com.au/ffximage/2004/...b__430x275.jpg |
Freak waves
On Tue, 31 Jan 2006 02:40:36 GMT, "Roger Long"
wrote: But, those are shoreline breaks. One of the articles in which that picture appeared indicated that it was occurring in deep water and that this the kind of thing you could encounter offshore. I'd take that with a grain of salt although it could happen with large storm waves hitting an adverse current. Mavericks is somewhat off shore however and in relatively deep water, it's just shallow compared to the surrounding area. There are places like that on the east coast but not as well known, such as Southwest Ledge at Block Island (N41-07.08, W71-39.37, depth 21 to 35 feet, about 3 miles off shore). It would probably be as well known as Mavericks if the North Atlantic was consistently prone to the same sort of large swells that the Pacific has. I have seen some very impressive swells near Block Island and also on the coast of Maine after a hurricane has passed a few hundred miles offshore. |
Freak waves
looks fake, but of course there are places away from "shore" that are
very shallow and can cause a wave to break, but everybody already knew that. i know there is one of those places miles off of the hawaiian islands, i remember seeing it on a surfing special where the surfers take boats way out into the ocean to get to this break. anyway ... i'm confident that there are freak waves out in the ocean sometimes too, it just makes sense that there would be. waves are passing in different directions all the time, causing interference with one another, diminishing each other's power, and then sometimes increasing it. it just makes sense that occasionally by chance and fate you would get a few waves that had bounced off of the coasts or come from far off storms that would just suddenly come upon each other and be in phase and spring up as a giant breaking peak, maybe even exploding under a boat, then disappear just as suddenly into the relative calm. hey, if you splash around in the hot tub it happens, and that seems like an ok testing ground to me lol. |
Freak waves
Hi:
There is no such thing as a freak, sneaker, rogue, or maverick wave. Waves come and go because of several factors that influence crest, trough, length etc. Wayne B. has the right idea. Why would a monster wave appear out of nowhere 100 miles off the Oregon coast? Gee, maybe Cobb Sea Mount?! Water depth is about 12 fathoms at the top of the sea mount and just a few feet later you're looking down at 2,500 feet of deep blue sea. Gee, why would a long sea swell traveling 1000s of uninterrupted miles randomly, an possibly sneaky, break there? The problem is knowing enough to be prepared and knowing that really weird stuff happens for a reason. Conditions and events are predictable or at least to be expected. Do not blaming the sea when you get caught with your pants down. The latest boat deaths on the Oregon coast were caused by Richard J. Oba, a licensed charterboat operator with 30 years of maritime experience. He pleaded not guilty to three counts of seaman's manslaughter in the Sept. 19 deaths. He was a charterboat operator who failed to follow USCG and other charterboat operators advice to not enter the closed bar at Winchester Bay, OR. What part of, "the bar is closed" that is so confusing? He drowned 3 passengers. Interesting, the indictment states that Oba never conducted a safety briefing for his passengers as required by law; never told them where the life jackets were on the boat; and was the only one wearing a life jacket when the boat was swamped. Interviewed by the Oregonian newspaper he was quoted saying that a sneaker wave came out of nowhere and capsized his boat. The same story happened a couple years ago on another charter boat called the Taki-Too. Taki-Too, a 35 charter boat capsized with 19 on board. Eleven people including, the captain, died in similar conditions as the above boat. That day the Coast Guard issued a warning of high surf and rough bar conditions that morning and declared the Tillamook Bay bar closed to all recreational boaters as well as to charter boats that had not been inspected and approved for heavy surf conditions. The Taki-Too was inspected and approved for heavy surf conditions. Again another "sneaker wave" came out of nowhere and swamped the boat according to a crewmember. There is no such thing as a freak, sneaker, rogue, or maverick wave. Granted there are some that are bigger than the rest. But they are that way for a reason. Read, learn, and watch the ocean. Watch the ocean a lot. Unusually large waves are rather predictable. Bob |
Freak waves
"Wayne.B" wrote in message It would probably be as well known as Mavericks if the North Atlantic was consistently prone to the same sort of large swells that the Pacific has. You're the wrong side of the Atlantic then! I have seen some very impressive swells near Block Island and also on the coast of Maine after a hurricane has passed a few hundred miles offshore. The Bay of Biscay is notorious for amplifying big ground swells, and during winter, these are frequent. The interesting spots are the 8m deep banks 1 to 3nm off the entrance to A Coruna and other harbours in NW Spain. Just a 1m ground swell creates 3m breaks, and as the ground swell increases, so you'll see many examples like this photo. It's pretty daunting following the lead lines into A Coruna with a big ground swell running, but they follow flattish water so they're quite safe. It's the sight of the turmoil around you that's scary. Similar spots off Lisbon. JimB |
Freak waves
News f2s a écrit:
The Bay of Biscay is notorious for amplifying big ground swells, and during winter, these are frequent. Have a look at this : http://www.wannasurf.com/spot/Europe...ntry/belharra/ These waves, up to 20m (65') high, breake about 1 nM ashore over a reef located close to Saint Jean de Luz harbour, France. You can read : "It need at least 20 feets to start breaking at hight tide. The bottom is 15m deep at low tide. Noone knows how big it can be..." -- Peio |
Freak waves
Bob wrote:
Hi: There is no such thing as a freak, sneaker, rogue, or maverick wave. Waves come and go because of several factors that influence crest, trough, length etc. Wayne B. has the right idea. Why would a monster wave appear out of nowhere 100 miles off the Oregon coast? Gee, maybe Cobb Sea Mount?! Water depth is about 12 fathoms at the top of the sea mount and just a few feet later you're looking down at 2,500 feet of deep blue sea. Gee, why would a long sea swell traveling 1000s of uninterrupted miles randomly, an possibly sneaky, break there? There is no such thing as a freak, sneaker, rogue, or maverick wave. Granted there are some that are bigger than the rest. But they are that way for a reason. Read, learn, and watch the ocean. Watch the ocean a lot. Unusually large waves are rather predictable. Bob Bob, When we call them "freak" or "rogue" waves, it is not because we don't know where they come from. It is because they are out of character with the other waves around at a given time. They do exist and are well documented. We are even able to spot them from space using synthetic aperture radar now. Check this website: http://www.math.uio.no/~karstent/waves/index_en.html While watching the ocean, those waves that are significantly bigger than the rest are freaks. We know why. Gary |
Freak waves
On Tue, 31 Jan 2006 15:31:01 GMT, Gary wrote:
Check this website: http://www.math.uio.no/~karstent/waves/index_en.html While watching the ocean, those waves that are significantly bigger than the rest are freaks. We know why. ======================================== Good reference, thanks for posting it. |
Freak waves
Hi Gary:
I must disagree respectfully. To label a wave as a "freak or rogue" to justify the deaths of your passengers suggests that a mariner is helpless, can do nothing to avoid such conditions. The wave is such a random act the operator is helpless. It is too easy to say, "the reason why all my passengers died was because an unexplained wave came out of nowhere" is simply irresponsible. Gary says, "...It is because they are out of character with the other waves around at a given time. They do exist and are well documented...." So we agree that unusual waves do exist. So they are a part of marine environment. If that is the case they are not freaks, or rogues, they are simply an expected, and therefore predictable, wave that may lie outside that second standard deviation. An analogy may be the following: When a drunk gets into a car and kills a bunch of people is it a preventable crash or an accident that just happened? You know the line, " and then the car went out of control. There was nothing I could do!" Well there was something I could do............ Duhhh, do not drive while impaired. Sure different sized waves are seen from satellites. That is my point. They are out there. There are many reasons why they are there. But I believe it is very dangerous and irresponsible to blame the wave. Why should we make inadequate knowledge or poor judgment a justifiable reason for killing people who are on our boat? How about this one, "people kill people waves don't." Agree of Disagree? Bob |
Freak waves
Back when I was involved with large sailing vessel stability and
accident analysis, I used to say something similar: "Vessels with good stability get hit by squalls, vessels with poor stability get hit by microbursts." -- Roger Long |
Freak waves
Sure different sized waves are seen from satellites. That is my point.
They are out there. There are many reasons why they are there. But I believe it is very dangerous and irresponsible to blame the wave. Why should we make inadequate knowledge or poor judgment a justifiable reason for killing people who are on our boat? i'm not trying to be difficult ... but, these sources being sighted, i read more about these waves after seeing the references posted here and they're saying these things are many times the height of the waves around them and strike suddenly without any warning. they can occur in relative calm, and they aren't that rare according to the radar study. like you can be in a 5 meter sea and suddenly you're looking at a 30 meter wave. what could be considered adequate knowledge and good judgement when faced with a 30 meter wave in a 5 meter sea ? it seems like the only sure way to avoid the death of everyone on board is just to stay at home and never be on the ocean in the first place. what design considerations could you make in a 30 or 40 foot sailboat to deal with a 30 meter wave ? it's just beyond anything we're prepared for, and i am really interested in what you could possibly do to prepare for it. 30 meters, that's like 90 feet high ... that's GINORMOUS, i mean if you see a 30 meter wave on a 30 foot sailboat, you might as well take a sip of champagne and wave to it cheerfully from deck, cause your history. :) |
Freak waves
On 31 Jan 2006 10:35:54 -0800, "purple_stars"
wrote: if you see a 30 meter wave on a 30 foot sailboat, you might as well take a sip of champagne and wave to it cheerfully from deck, cause your history. Probably true if the wave is breaking. You could try assuming the nuclear attack position. That's where you bend over, put your head between your legs, and kiss your butt goodbye. In all seriousness, if you are below with the hatches securely battened down, you might get out of it. Without your mast of course, but possibly alive and floating. |
Freak waves
Hi Purple:
You say, "these things are many times the height of the waves around them and strike suddenly without any warning. they can occur in relative calm, and they aren't that rare according to the radar study. " I agree. That is why those very large waves are not rogues. Just uncommon and most likely predictable. For example, I was sailing south 2 miles off WA coast one summer. Yes, a bit too close for that area. The weather was typical: NW 15-25K 10'-12' swell, a few breaking. After checking the weather I also knew there was a bit of a hurricane way south last week. Humm... might send some big swell our way. Sure enough as I was having a great time surfing south about every 10 minutes a big one came out of the SW. No problem until the NW swell happened to get in sink with the SW swell in a shallow area. Gads! What a view from the top! In a moment I was sliding down the face of an incredible wave. The only thing problem, it was three boat lengths to the bottom of the wave (39' x 3 lengths = 117'). Cool ride to the bottom? Or a freak wave that nearly killed me? You be the judge. Yea, I realize that the wave height was not 117' because my slid down the face was actually the hypotenuse. But still very exciting. So was that a killer rogue wave out of nowhere that struck suddenly without any warning? Or just a known possibility the operator considered and took steps to ameliorate an inevitable event? Read, watch the ocean, talk to the USCG, read, watch the ocean, talk to OLD commercial fisherman and enjoy the wonders that nature offers. There is no such thing as a rogue or sneaker wave. Bob |
Freak waves
"Bob" wrote
There is no such thing as a rogue or sneaker wave. Sure there is. They're the big ones that come along infrequently but more often than people realize. You are making much to much out of semantics here. They are not supernatural but rare enough to deserve a special name. -- Roger Long |
Freak waves
Hi Roger:
I think you are right.......... maybe too much spare time on my hands and too much coffee this week. Thus the rant. But my gut feeling is that too many people still blame sea conditions when they should accept responisbity for killing pasangers. I think the two charterboat operators i described ealier are examples of peole who broke all the ruls, did not listen to the USCG and then blamed a wave. Gotta go, Bob. |
Freak waves
Yes, they broke the rule and then got hit by the wave the rule was
intended to protect them from. Sort of like pushing someone out of an airplane and then claiming it was the ground that killed them. -- Roger Long "Bob" wrote in message ups.com... Hi Roger: I think you are right.......... maybe too much spare time on my hands and too much coffee this week. Thus the rant. But my gut feeling is that too many people still blame sea conditions when they should accept responisbity for killing pasangers. I think the two charterboat operators i described ealier are examples of peole who broke all the ruls, did not listen to the USCG and then blamed a wave. Gotta go, Bob. |
Freak waves
Read, watch the ocean, talk to the USCG, read, watch the ocean, talk to OLD commercial fisherman and enjoy the wonders that nature offers. There is no such thing as a rogue or sneaker wave. Bob Hmmmmmm...... Pitch black night, moderate seas, all of a sudden WHAM..... and you could predict this how? Pea soup fog, moderate seas, all of a sudden WHAM....... and you could predict this how? Sorry Bob, but "rogue and sneaker waves" exist. I could go on with many scenarios. Now, I'm not one for accepting excuses when someone screws up, but in my meager experience, bad waves sneak up on you and rogues do exist. otn |
Freak waves
Bob wrote:
Hi Gary: I must disagree respectfully. To label a wave as a "freak or rogue" to justify the deaths of your passengers suggests that a mariner is helpless, can do nothing to avoid such conditions. I wasn't speaking of deaths or passengers just the existence of what the rest of the world calls rogue or freak waves. The wave is such a random act the operator is helpless. It is too easy to say, "the reason why all my passengers died was because an unexplained wave came out of nowhere" is simply irresponsible. Gary says, "...It is because they are out of character with the other waves around at a given time. They do exist and are well documented...." So we agree that unusual waves do exist. So they are a part of marine environment. If that is the case they are not freaks, or rogues, they are simply an expected, and therefore predictable, wave that may lie outside that second standard deviation. You are wrong: Freak wave From Wikipedia, the free encyclopedia Freak waves, also known as rogue waves or monster waves, are relatively large and spontaneous ocean surface waves which can sink even medium-large ships. In oceanography, they are more concisely defined as waves that are more than double the significant wave height (SWH), which is itself defined as the mean of the largest third of waves in a wave record. Once thought to be only legendary, they are now known to be a natural (although relatively rare) ocean phenomenon. Their existence was known anecdotally from mariners' testimonies and damages inflicted on ships; however, their scientific measurement was only positively confirmed following measurements of a freak wave at the Draupner oil platform in the North Sea on January 1, 1995. During this measure, minor damage was inflicted on the platform, confirming that the reading was valid. In the course of the Project MaxWave, researchers from the GKSS Research Centre, using data collected by ESA satellites, identified a large number of radar signatures that may be evidence for freak waves. Further research is underway to verify the method that translates the radar echoes into sea surface elevation. Freak waves are a likely source of the sudden inexplicable disappearance of many ocean-going vessels. An analogy may be the following: When a drunk gets into a car and kills a bunch of people is it a preventable crash or an accident that just happened? You know the line, " and then the car went out of control. There was nothing I could do!" Well there was something I could do............ Duhhh, do not drive while impaired. Stupid analogy. A better one would be a sober man getting in a car and as he is driving along a tree falls on the car. Freak accident! Sure different sized waves are seen from satellites. That is my point. They are out there. There are many reasons why they are there. But I believe it is very dangerous and irresponsible to blame the wave. Why should we make inadequate knowledge or poor judgment a justifiable reason for killing people who are on our boat? Unles it is true. Then what? A freak wave is very likely along the west coast of North America especially along river bars etc. That is why they close them! How about this one, "people kill people waves don't." Agree of Disagree? I guess it is clear....I disagree! Gary |
Freak waves
purple_stars wrote:
i'm not trying to be difficult ... but, these sources being sighted, i read more about these waves after seeing the references posted here and they're saying these things are many times the height of the waves around them and strike suddenly without any warning. they can occur in relative calm, and they aren't that rare according to the radar study. like you can be in a 5 meter sea and suddenly you're looking at a 30 meter wave. what could be considered adequate knowledge and good judgement when faced with a 30 meter wave in a 5 meter sea ? it seems like the only sure way to avoid the death of everyone on board is just to stay at home and never be on the ocean in the first place. what design considerations could you make in a 30 or 40 foot sailboat to deal with a 30 meter wave ? it's just beyond anything we're prepared for, and i am really interested in what you could possibly do to prepare for it. 30 meters, that's like 90 feet high ... that's GINORMOUS, i mean if you see a 30 meter wave on a 30 foot sailboat, you might as well take a sip of champagne and wave to it cheerfully from deck, cause your history. :) I think they exist and are more common in some areas than others. The areas are well known by sailors and fisherman and have a history. The great Capes for instance, Queen Charlotte Sound, the Alaska panhandle. Most of these areas are places people don't cruise and certainly not when the weather is miserable. Right now, up here in the Pacific NW we have a 970 millibar storm with 40-50 knot winds going through every 24 hours. No one is sailing (except the Clipper Venture yachts on there way from Tokyo!). The other thing of note is that most very large waves are not curling breakers like you see off Mavericks but big hills with the tops blown off. A well found boat that is battened down for the weather will survive. You may die of fright but the boat will, in all likelihood still be floating the next day. Like a bottle with a cork in it! Just keep off those lee shores. I have spent 15 years at sea (or so) in all types of boats and I haven't seen the freak yet. Touch wood. Gaz |
Freak waves
Roger Long wrote:
"Bob" wrote There is no such thing as a rogue or sneaker wave. Sure there is. They're the big ones that come along infrequently but more often than people realize. You are making much to much out of semantics here. They are not supernatural but rare enough to deserve a special name. Succinct and right. Nice Roger. Gaz |
Freak waves
"Gary" wrote
I have spent 15 years at sea (or so) in all types of boats and I haven't seen the freak yet. When you do, you'll never forget it. You look out towards the horizon and all the waves are going up and down. Way off, one isn't going up and down. It's just up there. The trough ahead of it is scarier than the wave when it finally opens up next to you. The damage done to smaller craft by these waves is almost always the result of the boat falling off the steep crest and through the air. Hull and superstructure damage is usually on the side away from the wave. -- Roger Long |
Freak waves
Hi otnmbrd:
Semantic diffrences I agree. However, there is a reason to split this rethorical hair. I belive accepting the term "freak wave" includes being powerless in the defintion. I say they do not exist. Why, because they are not freaks nor rogues and we are not powerless to avoid or manage them. "...Pitch black night, moderate seas... Pea soup fog, moderate seas..." and then WHAM! Sounds as though you know from first hand experince these waves happen..... often. So I guess they are not all that rare. I might even be so bold as to say.... expected and predictable. Soon or later, depending on when and where, and many times when we least expect one, its gonna happen. Maybe just a philosoph of the sea. So why consider them so exctionally freakish? They are a part of the playground. Oh, here is a good troll............................................ What type of boat is safest, most seaworthy, and best capable to survive a FREAK WAVE? Still Bobing |
Freak waves
"Bob" wrote in news:1138759290.301009.92650
@o13g2000cwo.googlegroups.com: Hi otnmbrd: Semantic diffrences I agree. However, there is a reason to split this rethorical hair. I belive accepting the term "freak wave" includes being powerless in the defintion. I say they do not exist. Why, because they are not freaks nor rogues and we are not powerless to avoid or manage them. "...Pitch black night, moderate seas... Pea soup fog, moderate seas..." and then WHAM! Sounds as though you know from first hand experince these waves happen..... often. So I guess they are not all that rare. I might even be so bold as to say.... expected and predictable. Good weather or bad, daylight or night, they can hit you. They don't even have to be big, just out of sequence. The point is you may very well be powerless to react correctly or in time for numerous reasons that may involve your boat or yourself....at any rate, frequently unexpected and not predictable no matter what your experienbce or how well you are watching. Soon or later, depending on when and where, and many times when we least expect one, its gonna happen. Maybe just a philosoph of the sea. So why consider them so exctionally freakish? They are a part of the playground. They are, but we need a term and "freak" and/or "rogue" tend to fit. Oh, here is a good troll............................................ What type of boat is safest, most seaworthy, and best capable to survive a FREAK WAVE? Still Bobing BG A 500,000 tn, fully loaded tanker in deep sea conditions EG.....maybe. otn |
Freak waves
Howabout an SSBN sitting on the bottom?
Bob |
Freak waves
"Roger Long" wrote in message ... I've run across this picture a couple places on the net and am wondering if it is real or a digital paste up. http://www.smh.com.au/ffximage/2004/...b__430x275.jpg If real, it is very spooky because of the relatively benign conditions around it. You would expect something like this in a well developed major storm but not in the general sea state shown. It doesn't look like a breaking shoal. If these things do exist, they must be exceedingly rare and this must be one of the luckiest pictures ever taken. I'm guessing this is a digital fake. -- Roger Long Roger I've been surfing all my life and I'm 54 now. The wave is real - what puts it "out" is the cropping of the shot. It is a fairly standard wave breaking on a flat reef complex probably very close to a shore or headland. You just don't get a look at the surrounding features. It's probably not all that big either, it's just the perspective it's taken from. Sure is ugly, though. I would bet there's very little space between where it's breaking and where it will end up - if'n you had your boat in between the two, I'd guess the rocks would be more of a problem than the wave itself. The following posters' Mavericks shots are scarier because they're a long way off shore and they're mighty big. The only good thing about them is that you'd get pounded all the way out of the zone and into flat water if you stayed together long enough. regards Hoges in WA (as in Western Australia) |
Freak waves
Here are some freak waves to check out:
http://dode777.jeeran.com/announcement_page1.html http://www.opc.ncep.noaa.gov/perfect...ogue_wave2.jpg http://happycarpenter.blogs.com/the_...wave-thumb.jpg http://www.wingo.com/newick/roguewave.html Yea Baby! http://www.bbc.co.uk/science/horizon...nchen800hi.jpg Not real, but gets you thinking! http://www.weather-forecast.com/gall...&cat=0&pos=-24 The wave debated about. http://www.strangecosmos.com/images/content/102022.jpg http://www.strangedangers.com/images/content/108140.jpg http://www.cherryflava.com/photos/un...ed/shark01.jpg Not a rogue wave, but I don't want to see this either! http://www.oceannavigator.com/articles/1153/ http://www.mcaorals.co.uk/ship%20disasters.htm SeeYaa:) Harbin |
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