Definition(s)
Ballast Control Operator (BCO)
Ballast Control Operator (BCO) means the person assigned responsibility for the normal day-to-day control of trim, draught and stability.
Source: IMO Resolution A.1079(28), Recommendations for the Training and Certification of Personnel on Mobile Offshore Units (MOUs), Adopted on 4 December 2013, International Maritime Organization, Regulatory Guidance