What does it take to pitchpole a boat?

DuckHunterJon

Lieutenant Junior Grade
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Apr 19, 2010
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1,082
Saturday, we had the boat out in Chaumont Bay, NY. In the morning it was like glass. We went out fishing, came back in for lunch, then went back out and skied for a while in the afternoon. Around dinner time, we decided not to leave it tied up to my parents dock as we would be heading up to the St Lawrence early Sunday morning. We heading back to the boat launch (about 4 miles), and the wind was really picking up. I wanted to go out around a shoal marker, and was heading out into bigger water. The waves were progressivly getting bigger, but I kept asking my wife and she said she was fine with it. We were getting a little spray over the bow, but nothing more than spray.

About 25 yards out, I saw a set of big waves. I'd say they were 4 -5 feet, 3 in a row. I know I didn't want they to hit us from the side, so I steered towards them. The boat rode up on the first one, came down, rode up on the second one. That time it came down right into the third. I was standing, and watched the bow punch about a foot under the top of that wave. Bear in mind, my Procraft sits low to the water, and the bow slopes down in the front. The water came over the bow, up the windshield, and knocked me clear over the helm seat and into the back of the seat. Motor killed as I pulled the tether off. I got back to the seat, fired it back up, made a hard port turn, and was with the waves heading back to shore.

I was a bit scared, but figured we're out of the worst of it, heading back in around the shoal marker. The waves were coming at our stern, and quickly, I was taking water over the bow when each wave would push the stern up, and force the bow down. After about 3 of these, I was able to find the right speed to stay on the back side of a wave, and rode it most of the way in to the launch.

Question, while the initial bow over the wave was a little scary, it was very quick, the boat pretty much punched through it. On the way back in, however, the bow would dive into the wave ahead of it, and pretty much sit there. Seemed like slow motion. I don't want to relive it - but my question is how close were we to pitch poling? I don't imagine it was a possibility, but I'm not sure how much it takes to flip a boat forwards. Has anyone experienced it and can give and idea of what it took?

Thanks.
 

ziggy

Admiral
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Jun 30, 2004
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7,473

DuckHunterJon

Lieutenant Junior Grade
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Apr 19, 2010
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Re: What does it take to pitchpole a boat?

Thanks for the video link. That's exactly what was happening, only to a much lesser extent. Judging by the animation, and and my own thinking, I would think the height of the waves would have to be somewhere around half the length of the boat to over turn it. We weren't even close, but was still scary taking enough water on for the bilge pump to run for about minutes straight.
 

TerryMSU

Senior Chief Petty Officer
Joined
Jul 31, 2007
Messages
743
Re: What does it take to pitchpole a boat?

Depends on the boat. Based on my experience on a catamaran sailboat (Hobie 16) not a lot. However, that is a different animal entirely. I had never even thought that a power boat could pitchpole. I would think that conditions would require high speed, high center of gravity, and stuffing the bow. (At least those were the required conditions on the Hobie.) Of those, you have full control over speed, some control over center of gravity, and some control over the chance of stuffing the bow. On the Hobie, I also had a high center of thrust (thrust centered high on the sail). Fortunately the Hobie was design to take a pitchpole. No loose running gear, no motor, and no electronics. Even then a pitchpole on a catamaran is a WILD ride. On a power boat, it would be a nightmare! Thanks for bringing back some great memories.

TerryMSU
 

Boatist

Rear Admiral
Joined
Apr 22, 2002
Messages
4,552
Re: What does it take to pitchpole a boat?

Pitch pole a boat is usually deadly but I never heard of it going into a sea. It normally happeneds with a following sea. This is one time when you want the trim tabs and the motor trim set for a high bow. Riding the back side of the swell near the top but never go over. If you go over the boat gains speed down the face and bow drives into the back side of the next wave and the swell behind pushes the stern over the top.

Going into the swell you must slow down but keep enough power for good steering to make sure the swell does not push the bow to one side or the other causeing the boat to brouch and capsize.

Going into the swell it ok to let the wave push you backwards as long as you keep on enough power to maintain steering.

I try and watch 3 swells ahead and you can usually steer around the steepest swells.

Ofcourse every boat has it limits and you must learn what it is and respect the sea.
My 21 foot boat is 8 feet every 8 seconds. We been out in 9 feet every 6 seconds but headed in way early. It was still safe but no fun and lot of danger if you make a mistake.
 
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