[GoLightly]

From the site you posted.... According to Lt. Rassmann the boats had already lost one man earlier that day, and were now “hell-bent on the run” as the ambush continued. As they sped down the river, one boat was blown out of the water, and then another. An explosion wounded Kerry in the arm and threw Rassmann into the river. *snip*

PCF-3 was the first boat "blown out of the water". And the other one would be???

[what's up]

I believe they will say the second was Kerry's. This (they will say) is why Rassman was thrown into the water (even tho we know it was because Kerry sped up to get out of there).