A Question

This is going to be a short post for now, we just need a little question answered. We're about to order the wood for the floor in the bedroom/bathroom area, and someone suggested that instead of using WBP Ply we could use P5 Moisture Resistant Chipboard. Now this appeals to us as this chipboard is half the price of WBP Ply but even though it's suitable for use in Bathrooms etc is it suitable for a houseboat. Any ideas or experience will be gratefully received.