How to fight a big wave?

Forktail

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Feb 11, 2002
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977
Re: How to fight a big wave?

There are several ways you can lose it in rough water. Whether it be one big wave, 4-foot chop, or 10-foot swells.<br /><br />The most common loss of control is breaching. This happens when your speed coming off a large wave is too fast and your bow plows into the next wave, slowing the front of the boat down as the back pushes around. Here, you find yourself in the trough of the wave being capsized. It happens almost instantly.<br /><br />Some operators go too slow, trying to avoid a breach, only to have the aft of the boat swamped by the wave behind (following sea).<br /><br />The trick is to navigate under just the right amount of power. Not too fast and not too slow, ready at all times to punch it or back completely off. Riding the waves, but in control.<br /><br />Another mistake is navigating in the trough (beam seas). Surprise waves can capsize a boat from the side without warning. It is important to attempt some type of angle on the waves at all times under power, only running in the trough to make ground when the waves dictate.<br /><br />Sometimes heading directly into waves (head seas) is not good. You can end up literally flying off a wave with nothing under you, only to hit the next head on. It can literally break a boat up, or create a nose dive condition that never rights itself (flips/endo's). Power is a must.<br /><br />Every situation is different and only experience can help. A wide, stable, low CG rough water boat with power to spare helps. But the two most important factors are boat speed and the distance between waves (not necessarily the height).<br /><br />The original poster's situation would probably warrant heading directly into the wake under slight power. Mostly because there is no wave behind him or after the first. But if all waves one after another were that big, some serious rough water techniques would need to happen to survive.<br /><br />But no rough sea can be navigated in a straight line. Quartering waves is a must. Not only to avoid the brutal head-on force, but to get to the direction you're going. Carefully play the big guys and take advantage of a chance to make progress. Sometimes I must navigate by quartering a mile east, then a mile west...just to go north. Sometimes a 10-foot swell sea is much easier to navigate than a 4-foot chop. And sometimes I just don't go.<br /><br />With a 30' tide change here and 15 mph currents, heading directly into the waves isn't an option. Otherwise my course would put me 50 miles from home. I have to tact as a sailer would.<br /><br />It all depends on the boat, the waves, speed, and the captian's experience.<br /><br />Learn more here: <br /><br /> http://www.docksidereports.com/rough_water_seamanship_1.htm
 

muglydog

Cadet
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Nov 26, 2001
Messages
17
Re: How to fight a big wave?

IMHO the best way to meet a large wave or wake isby slowing down and approaching the wave at 45 degrees. The more you slow down the less strain there is on the hull. Boat trim and weight distribution has a significant effect when under adverse conditions. A vessel with too much weight forward will plunge rather than rise, and with to much weight aft, the bow will tend to fall off. The problem with meeting the waves head on is that the boat will tend to charge down the backside of the wave and if the approaching face is steep the bow may punch into the wave and swamp the boat. Also as the boat tops the wave the prop may come out of the water and race and at this point you loose steerage. Check out Chapmans Piloting Seamanship and small boat handling for more information on this subject and other neat stuff.
 

Forktail

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Feb 11, 2002
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Re: How to fight a big wave?

Chapman's is a great book.<br /><br />There's a time and a place for quartering a wave. Quartering really big waves can capsize you. There's much more surface area of the boat for the wave to push on, and the leverage the wave now has on the boat for capsizing is much greater.
 

aquaboy

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Apr 5, 2002
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Re: How to fight a big wave?

Just thought I'd add my two cents here, 'cos I would hate to think that someone would read some advice, act on it, & end up dead. <br /><br />Bit of background. I live in a coastal town in Australia. Lived and surfed here all my life, and the town has a 'bar' which must be crossed if you want to get from the river to the ocean. I know a lot about waves, a lot about how they act on a body in the water, & I've surfed up to ten foot waves on our 'bar' on dozens of occasions<br /><br />Please be aware if you are reading this thread that there are many, many different types of waves, & NOTHING will substitute for local knowledge. <br /><br />These days I've got a 16ft boat with 90hp on her, I'll occasionally head out to sea for a bit of a fish.<br /><br />But let me tell you folks, I'm not goin over that bar if it's breaking. No siree. As far as I'm concerned, even with my local knowledge, that boat is just too buoyant. I've been over it in only 3 or 4 feet of swell, & I can tell you now that I found even a small breaking wave bloody terrifying, as I know it can cost you your boat & your life. I've seen it many, many times where a wave has picked up a boat and shoved it right back on it's ass!! As for the whole 45 degree concept, that may be fine if a wave hasn't broken, but if it starts to break in my opinion you'd be in a whole heap of trouble. It's well known around these parts that whitewash should only be approached head on, and if possible avoided at all costs. The problem being that you're presenting the side of the boat to the wave. Doesn't take much to figure out what's gonna happen then. Also, that lovely whitewash then leaves a heap of bubbles behind. Guess what? Hit that gas, & nothing happens. The water is full of air!! 5 seconds later the next wave is hitting you broadside. Not pretty<br /><br />Just making the distinction here folks - would hate for someone to think to themselves "oh ok, I'll give that a try" without really knowing what they're doing. <br /><br />Different waves, different locations, different tactics. If you are not absolutely positive of what you're getting yourself into, don't go. Could be very costly. <br /><br />Aqua
 

aquaboy

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Apr 5, 2002
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Re: How to fight a big wave?

One thing I forgot to add. If you're going fishing outside for a few hours, the nature of the bar you crossed getting out may have changed dramatically. Dropping tide leads to strong 'pressure waves' building up where the river meets the ocean. Also decreases depth (obviously), resulting it shorter, sharper breaking waves. In fact, a bar may not break on high tide due to the depth of water, but begin breaking at low tide. A sudden wind change or drop in local air pressure can lead to a what was a flat bar being virtually uncrossable only hours later. Sorry to harp on here, but being a tourist town we've seen too many people who are unfamiliar with the ocean lose their lives in recent months. (Sobering reminder - already lost about 12 people this year within 100k radius of our little town (30,000), including a mother & her two kids. <br />Don't EVER underestimate the sea folks.
 

12Footer

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Mar 25, 2001
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Re: How to fight a big wave?

Very,very good points, Aquaboy! You certainly can't put a swell to a breaker. two totaly different wave types.
 

crab bait

Captain
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Feb 5, 2002
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Re: How to fight a big wave?

that's great reading AQUABOY on big breakin' WAVES but how about big WAKES..
 

Forktail

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Feb 11, 2002
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977
Re: How to fight a big wave?

Wakes can have breakers too. It depends on where along the wake you approach it, and what sea the wake is on top of. I've seen oil tankers, cruise ships, and large tourist boats make more than just rolly-polly water. The scarey thing is that they can be a mile away on a calm day.....and suddenly their 5-ft high wake is on you when you least expect it.<br /><br />In open sea, breaking waves can be maneuvered. Usually the whole wave doesn't break. Small crafts can usually pick their way using a close eye and experience. It gets bad when the waves are close and choppy, or if they're extremely large. Like aquaboy said, tides, currents, shallows, etc. enhance this situation.
 

shorenomore

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Apr 2, 2002
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Re: How to fight a big wave?

Not that this would work in all situations, but the meanest wave I ever had the misfortune to meet just barely allowed me over her. Her sister was coming next and together they convinced me that I was done fishing on the ocean that day, so I got on the first one's back and rode her in the whole way ( not a breaking wave ) into the inlet where I quickly medicated myself once on shore.
 

62_Kiwi

Lieutenant Junior Grade
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Jan 20, 2002
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Re: How to fight a big wave?

I was out on the Waitemata Harbour today and it was very busy - lots of boats of all shapes and sizes. The big boats, as expected, churned up some pretty big wakes, so I was able to do some "practical testing" of the head-on and 45 degree theories in my 19' F/G CC boat.<br /><br />The result was with big wakes, for my boat... no doubt about it - it was much more comfortable to cross the wave at 45 degrees than to hit it head on. This may not apply to all boats and all wave/wake sizes - but certainly does for mine for the big wakes I saw today.<br /><br />BTW - a good day's fishing. Around 30 snapper (lost count) - a pity we had to throw all but 2 back... :)
 

twwmm

Seaman
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Mar 7, 2002
Messages
68
Re: How to fight a big wave?

Interesting reading, one point to make sorry to state the obvious but NOT SIDE ON, quickest way to tip over. Have boated through Sydney heads over many years you soone have to find the best speed head on,helps but quite often you get two sets of waves one head on and another set at an angle. It is not ucommon to head up to the waves turn 45 to track over the next set back to head up etc and actually go past the entry point to tghe harbour. What I look for is then a line to follow on the backs of the wave straight into the port, can be hard work. Trying to keep on the back of a single wave is the best point.<br /><br />Again experience counts.<br /><br />It sound as if you should use the old sailors trick, invite some local knowledge along to show you some ropes in your own boat, probably cost you a beer or two afterwards. We have some volunteer groups here (coastal patrol and Volunteer coast guard) they see themselves sometimes as gods gift but it is still worth the pratical experience, then you can experiment and learn on your own. It makes it just that bit safer to swallow the pride (if any that is) and spend a couple of hours with tuition.<br /><br />Best regards and have safe time.<br />Terry<br /> :p
 

12Footer

Fleet Admiral
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Mar 25, 2001
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Re: How to fight a big wave?

frinstance..........<br />A psuenammi (sp) or tidal wave at sea could be taken with no problems in my Bayliner Capri...BUT, as it approaches shallower water, the energy gets pushed up by the ocean floor, and it becomes a gajillion feet high..Same wave,different area,totally different plan of attack.
 

JB

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Mar 25, 2001
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45,907
Re: How to fight a big wave?

Wow! A lot of good info and insight here.<br /><br />My input is more philosophical than tactical.<br /><br />I have always found it a very reliable way to get along with natural forces to cooperate with them rather than fight them.<br /><br />If the forces are too strong for cooperation, don't go there. Too much wind, too much wave, too much heat, too much cold are all values we need to learn and avoid. If you fight Mother Nature, sooner or later you will lose.<br /><br /> :)
 

butlp

Petty Officer 1st Class
Joined
Feb 26, 2002
Messages
302
Re: How to fight a big wave?

I'd be interested to know what the Coast Guard, and the British Royal Lifeboat Association teach their boat captains to do in really big seas. They don't have the luxury to stay home if Mother Nature is throwing her worst at us poor boaters.
 
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