Sydney Harbour, off Circular Quay. 20 February 2014.
See Google Earth 33°51'15.73" S 151°12'50.57" E

Seahorse Mercator is a navigational training vessel operated by Defence Maritime Services under contract to the Royal Australian Navy (RAN). She is a modified version of the Pacific class patrol boat design and is based at HMAS Waterhen in Sydney.

General characteristics
Class & type: Pacific class patrol boat variant
Displacement: 165 tons
Length: 31.5 m (103 ft)
Beam: 8.21 m (26.9 ft)
Draught: 2.6 m (8.5 ft)
Propulsion: 2 x Caterpillar 3304 diesels, 2 propellers
Speed: 16 knots (30 km/h; 18 mph)
Range: 2,880 nautical miles (5,330 km; 3,310 mi) at 8 knots (15 km/h; 9.2 mph)
Complement: 5 crew + 3 instructors and 18 trainees
Sensors and
processing systems: 1 x Furuno FE 606 navigation radar, 1 x Decca Bridgemaster ARPA navigation radar
Armament: None