Kaman SH-2 Seasprite

SH-2 Seasprite
SH-2F Seasprite of the US Navy
Role	Anti-submarine warfare helicopter Type of aircraft
Manufacturer	Kaman Aircraft Corporation
First flight	2 July 1959 (HU2K-1)
Introduction	December 1962
Retired	1993 (F United States Navy) 2001 (G USN) 2008 Royal Australian Navy
Status	Partially Retired;G model in service
Primary users	United States Navy (historical) Royal New Zealand Air Force Polish Navy Egyptian Navy
Produced	1959–1969 1971–1990s F/G model and conversions
Number built	184
Variants	Kaman SH-2G Super Seasprite

The Kaman SH-2 Seasprite is a ship-based helicopter originally developed and produced by American manufacturer Kaman Aircraft Corporation. It has been typically used as a compact and fast-moving rotorcraft for utility and anti-submarine warfare (ASW) missions. Early on it was modest sized single-engined naval utility helicopter, and progressed to twin-engine ASW and SAR, and the latest model served well into the 21st century, with G model in active service in the 2020s with Egypt, New Zealand, Peru, and Poland.

The Seasprite, with the internal Kaman designation K-20, was developed in the late 1950s in response to a United States Navy (USN) requirement for a suitably fast and compact naval utility helicopter. The USN found the Seasprite attractive, and ordered four prototypes and an initial batch of 12 production helicopters as the HU2K-1. Under the 1962 United States Tri-Service aircraft designation system, the HU2K and HU2K-1 were re-designated as H-2 and UH-2A respectively. Kaman also pursued foreign sales; after showing interest, the Royal Canadian Navy (RCN) rejected the Seasprite due to an unexpected price increase and underperformance during sea trials. The USN addressed the poor performance by converting the single-engine Seasprites into a more powerful twin-engine configuration from 1968.

In October 1970, the USN selected the Seasprite as the interim Light Airborne Multi-Purpose System (LAMPS) helicopter, resulting in the SH-2D/F variant with enhanced ASW and anti-surface warfare sensors. Most UH-2s were converted into SH-2Fs.

USN Seasprites were used for ASW, search and rescue (SAR), utility and plane guard for aircraft carriers. In the Vietnam War they were mainly used for combat search and rescue (CSAR), and combat support and surface warfare during the Gulf War. The SH-2G Super Seasprite was the last variant and — in 2001 — the last Seasprite to leave USN service. Retired USN Seasprites were offered as foreign aid in the 1990s and 2000s; this led to quite some interest and F and/or G models served with New Zealand, Poland, and Egypt. Retired models were also sent to aviation museums, and a number have been put on display. However, the latest upgraded models are still in frontline service with several navies around the world.