Tend the mooring lines as wind, current, and passing-ship wake try to work the vessel off the berth: heave on slack lines, ease the loaded ones, and keep every line within its Safe Working Load (SWL). Covers the standard six-line mooring configuration (headlines, breast lines, springs, and sternlines), OCIMF Mooring Equipment Guidelines (MEG4) for tanker moorings, and safe mooring line tending procedures for the OOW.
Correct mooring line management is a daily deck officer responsibility and a common source of Port State Control deficiencies. This game builds the situational awareness to respond to changing mooring load in real time.