Port Authority

You are Harbour Master. Ships arrive in real time and wait at anchorage until you decide whether each one can be cleared routinely. The advisor gives a calibrated chance and a range; you decide. The harbour does not stop while you think — waiting ships cost money every minute, and clearing the wrong ship causes incidents.

Keys while a vessel is selected: C clear · H hold · W why. A teaching game — clearance here is an operational decision, not a safety certificate.