Don't watch it sink! Never skimp on extra floatation in your hull. Put as much as you can. Some of the things used to help keep your hull floating if it rolls over and starts to fill with water are styrofoam, shipping airbags & swimming pool noodles. See the two above pictures, one is using a cut styrofoam that is molded to the hull design and the other is just a simple/basic pool noodle. We don't suggest the foam in a can, because it expands and can cause damage to the hull. Also, we suggest items that can the removed and dried out.Don't lose that expensive, hard-to-replace hatch! Tape styrofoam to the underneath of the hatch cover, when it gets torn off in an accident it won't sink!