Help out an ex-grunt here.
What is a “TDU weight” and why are so many laying around unused on subs available for mirth and practical jokes?
TDU = Trash Disposal Unit
It’s how the ship’s garbage is disposed of at sea...they compact trash into perforated steal canisters, and then insert steel weights in the canisters to make sure they sink when dropped out through the bottom of the boat.
1001 uses for TDU weights....