Operate a canal lock: manage the sluices to raise and lower the water level, open the mitre gates at exactly the right moment, and walk each vessel through both approaches without delay or collision. Covers the engineering principles of a navigation lock (filling and emptying ratios, water hammer management), PIANC guidelines for lock dimensions and passing speeds, and the hand signals and VHF radio protocols used between the lockmaster and transiting vessels.
Canal lock transits are required for thousands of vessels annually passing the Panama, Suez, Kiel, and St. Lawrence Seaway systems. This game builds the procedural knowledge relevant to any vessel navigating a locked waterway.