Lake-class inshore patrol vessel

HMNZS Rotoiti and HMNZS Pukaki in 2010
Class overview
Name	Lake class
Builders	Tenix Defence, Whangārei
Operators	Royal New Zealand Navy  Irish Naval Service
Preceded by	Moa class RNZN Peacock-class corvette INS
Cost	NZ$35.8 million (2008) per unit
Built	2005–2008
In service	2009–present
In commission	2009–present
Completed	4
Active	2 (New Zealand) 2 (Ireland)
General characteristics
Type	Inshore patrol vessel
Displacement	340 tonnes (loaded)
Length	55 m (180 ft)
Beam	9 m (30 ft)
Draught	2.9 m (9.5 ft)
Propulsion	Two MAN B&W 12VP185 engines, each rated at 2,500 kW (3,400 hp) at 1,907 rpm ZF 7640 NR gearboxes Two controllable pitch propellers
Speed	Top speed 25 knots (46 km/h; 29 mph) Patrol speed 16 knots (30 km/h; 18 mph)
Range	3,000 nautical miles (5,600 km; 3,500 mi)
Boats & landing craft carried	2 × RHIB with diesel-powered three-stage jet units
Complement	36 (includes 4 government agency staff and up to 12 others)[1]
Armament	3 × 12.7 mm machine guns Small arms
Notes	[2]

The Lake-class inshore patrol vessel (also known as the Rotoiti class and the Protector class) is a ship class of inshore patrol vessels (IPVs) of the Royal New Zealand Navy (RNZN) which replaced the RNZN's Moa-class patrol boats in 2007–2008. All four vessels were originally named after New Zealand lakes. Two of the ships were sold to Ireland in 2022.

Following long-running Navy retention problems in the wake of NZDF "civilianisation", two of the four vessels were tied up, inactive, in a 'Reduced Activity Period' for long periods between 2013 and 2018. In June 2019 the New Zealand Government announced that two of the patrol vessels would be withdrawn from service, and they were decommissioned in October that year. Both were later sold to the Irish Naval Service.