HMNZS Kahu (P3571) was a Fairmile B motor launch of the Royal New Zealand Navy.

(Post war)
History
New Zealand
Laid down	1942
Commissioned	1947
Decommissioned	1965
Fate	Scrapped in 2023
General characteristics
Class and type	Fairmile B class motor launch
Displacement	85 tons
Length	112 ft (34 m)
Beam	18 ft 3 in (5.56 m)
Draught	4 ft 9 in (1.45 m)
Propulsion	Twin petrol engines totaling 1200 bhp
Speed	20 knots (37 km/h; 23 mph)
Range	1,500 mi (1,300 nmi; 2,400 km) at 12 knots (22 km/h; 14 mph)
Complement	16
Sensors and processing systems	asdic, the forerunner of sonar
Armament	1 × 3-lb Mk I gun 1 × twin 0.303-in Machineguns 12 depth charges
Armour	Wheelhouse plated

Originally commissioned on 20 December 1943, with the pendant number Q 411, she was part of the 80th Motor Launch Flotilla. Early in 1944, she went to the Solomon Islands where she served under the operational control of COMSOPAC.

She was recommissioned from 1947 to 1965 as HMNZS Kahu I (P3571) ^[1]