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Can a pontoon boat sink? (1 Viewer)

If I took a shot gun and blew a bunch of holes in each of the pontoons, such that they could fill up with water, the boat would sink assuming they are just the typical air-filled ones.  But in reality those pontoons offer so much displacement that it takes an enormous amount of weight to submerge them completely.  

 
I would assume any boat is sinkable if its total weight exceeds its buoyancy capacity.


If I took a shot gun and blew a bunch of holes in each of the pontoons, such that they could fill up with water, the boat would sink assuming they are just the typical air-filled ones.  But in reality those pontoons offer so much displacement that it takes an enormous amount of weight to submerge them completely.  
I didn’t throw out the “displacement” term but this is what I was saying. I was in the minority opinion. 

 
I would assume any boat is sinkable if its total weight exceeds its buoyancy capacity.


If I took a shot gun and blew a bunch of holes in each of the pontoons, such that they could fill up with water, the boat would sink assuming they are just the typical air-filled ones.  But in reality those pontoons offer so much displacement that it takes an enormous amount of weight to submerge them completely.  
I didn’t throw out the “displacement” term but this is what I was saying. I was in the minority opinion. 

 
We were going through a smallish cut on Lake Washington where some big wakes were bouncing around when the front end of this pontoon went in at the trough of two “waves”, enough water to push the front door open, and pop the prop out of the water for a second or two.

People up front went to back, pontoons did their thing, boat corrected itself.

Whole affair lasted about 10 seconds tops. 

My words of comfort and reason fell on deaf ears. 

 
They can capsize, usually by flipping if the bow is stuffed too much but it is rare.  The pontoons are typically filled with foam.  Mine had a standard schreader valve on each toon where I could pressurize and check for leaks.

 
We were going through a smallish cut on Lake Washington where some big wakes were bouncing around when the front end of this pontoon went in at the trough of two “waves”, enough water to push the front door open, and pop the prop out of the water for a second or two.

People up front went to back, pontoons did their thing, boat corrected itself.

Whole affair lasted about 10 seconds tops. 

My words of comfort and reason fell on deaf ears. 
I have experienced the same situation. Front deck got under water due to too much weight. People moved to the back and the pontoon was fine.

 

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