I need help to spot breaking boards!!

Hello guys,
I've been longboarding for some 25 years, and I've broken a few (half a dozen, maybe?). Last one was my 9.3" tuflite in the pink 2 days ago. It's getting fixed, and I will keep riding it. It's my favourite board.
The swell was small, but a big set came out of nowhere, and I dived under the wave, I let go of my board. When I pulled it back, it was broken. It was still in one piece, but had a crack on the top from rail to rail...
I've broken a few boards with this escape "technique". Obviously it does not work.
What should I do, the next time a big set is closing out in front of me? What do you guys do?
Thanks
I've been longboarding for some 25 years, and I've broken a few (half a dozen, maybe?). Last one was my 9.3" tuflite in the pink 2 days ago. It's getting fixed, and I will keep riding it. It's my favourite board.
The swell was small, but a big set came out of nowhere, and I dived under the wave, I let go of my board. When I pulled it back, it was broken. It was still in one piece, but had a crack on the top from rail to rail...
I've broken a few boards with this escape "technique". Obviously it does not work.
What should I do, the next time a big set is closing out in front of me? What do you guys do?
Thanks