HNoMS Frithjof was a 1. class gunboat (built for the Royal Norwegian Navy. Like the other Norwegian gunboats of her era, she carried a heavy armament on a diminutive hull. The vessel was built at the Naval Yard at Horten, and had yard number 76.

Frithjof in Kiel, 1900
History
Norway
Name	Frithjof
Builder	Navy Yard, Karljohansvern
Yard number	76
Launched	15 November 1895
Commissioned	1895
Decommissioned	1928
General characteristics
Class and type	1. class gunboat
Displacement	1,280 long tons (1,301 t) or 1,360 long tons (1,382 t) (sources disagree)
Length	68.17 m (223 ft 8 in)
Beam	9.98 m (32 ft 9 in)
Draught	4 m (13 ft 1 in)
Propulsion	Reciprocating steam engine, 2,800 hp (2,088 kW), 2 shafts
Speed	15 knots (17 mph; 28 km/h)
Complement	154
Armament	2 × 12 cm (5 in) guns 4 × 76 mm (3 in) QF guns 4 × 1-pounder 37 mm (1 in) automatic gun[1] 1 × 46 cm (18 in) torpedo tube

Frithjof served with the Norwegian Navy as a gunboat and cadet training ship until stricken in 1928.