Moved to Tech Talk
It's techy (design wise) and dont need all the spam.
I'll see what I can come up with, Photoshop is not cooperating with me. But I've got some ideas. Most involve pontoons or large surface area.
Get the full rules from your teacher. What defines your ship sinking? Does just taking on water define a sinking or does the entire boat actually have to be submurged? Can it be a submarine? Can the pennies be suspended in the water but the body of the boat still be above water (ala Cargo Net)