Surviving on an ocean

So I’m coming out here for hopeful recommendations… I just got sucked in to something I have never come across: a system apocolypse book where the mc, along with others, were all dumped on an ocean where they had to survive by fishing out chests with supplies that help them expand their raft and make other stuff that would help them survive.

Then I saw another one like this but slightly different, where the mc is on an ocean but the survivors only have 3 days to upgrade their rafts before the storms start up…

Unfortunately both books are on one of those pay coins/watch ads/pay forever sites and I am not trying to do that.

So my question is does anyone know of any legit books ebook or audio, with this premise???

TIA