Chris W wrote:
Jim Macklin wrote:

A better solution is to fill the compartments with ping-pong balls.
They displace water, don't weigh too much and can be removed for
inspection and corrosion control.



Didn't the "Myth Busters" sink a boat and try to float it again by
filling it with ping-pong balls? If I remember right something on the
boat broke, and all the ping-pong balls spilled out.

They did that experiment on a sailboat they had sunk and it did in fact
bring the sailboat back to the surface.