At 1:25 scale, the lake area represents a navigable zone of about 5 by 2 nautical miles, allowing several models to sail at the same time at normal manoeuvring speeds and to berth at one of the 50 berths and piers. Shallow and very shallow water areas (less than 10% under keel-clearance for certain ships) are to be found on about 50% of the lake area.