If you...
Move the v-berth cushions out of the way. There are two top-entry hatches to the storage lockers below. I opened the port side and stuck my arm with a flashlight down into there reaching out to the hull and back along it under the seat. You will find the water lines here. Personally I would have preferred another locker instead of the seat. I have not found much use for it with the way I use my boat.You can get an idea of the space by looking at the other side in the storage locker. Note how small the locker is at the base.Are you looking to install something? or just searching around? We anually travel on multi-week trips with our 2004-33 and always find enough room for storage. It is only two of us though. I guess I can see space concerns if there are more of you.