The term cofferdam means a void or empty space separating two or more compartments for the purpose of isolation or to prevent the contents of one compartment from entering another in the event of the failure of the walls of one to retain their tightness.
source: CGFR 65-50, 30 FR 16657, Dec. 30, 1965, unless otherwise noted.
cite as: 46 CFR 30.10-13