DCHP-1 Online
bum gun 
on a sealing vessel, a gun fired periodically to let the sealers know where the ship is.
- 1958 Then would come . . . straining . . . to hear the dull report of the "bum gun" fired periodically for their guidance.
- 1958 Then would come . . . straining . . . to hear the dull report of the "bum gun" fired periodically for their guidance.