Ballast Control Operator
Ballast Control Operator or BCO means an officer restricted to service on mobile offshore drilling units (MODUs) whose duties involve the operation of the complex ballast system found on many MODUs. When assigned to a MODU, a Ballast Control Operator is equivalent to a Mate on a conventional vessel.
Source
46 CFR § 10.107
Scoping language
With respect to part 16 of this subchapter only, if the definitions in paragraph (b) of this section differ from those set forth in 16.105, the definition set forth in 16.105 applies.