Latest Sikorsky customer for Sea King is the Argentine Navy, which has recently taken delivery of four examples of a version known as the S-61D-4.

The much-modified SH-3H is now entering service with the US Navy and many SH-3As and SH-3Gs are expected to be converted to this standard eventually.

A Sikorsky HSS-2 in the markings of Squadron HS-10, one of the first US Navy units to become operational on the type.

The second example of the SH-3H completed by Sikorsky.

The second example of the SH-3H completed by Sikorsky.

The Spanish Navy was among the first overseas customers for the Sea King, and has recently ordered a second batch of four, one of which is shown here on test at the Sikorsky plant.

Ten specially-equipped and furnished examples of the basic SH-3A design were built for use by Executive Flight Detachment to carry the US President and other VIPs. Designated VH-3As, they are operated by the US Army and USMC.

Some of the many variants of the Sikorsky S-61 family.

Used by the US Coast Guard for air-sea rescue duties, the specially-equipped HH-3F is named Pelican.

The USAF's CH-3E Jolly Green Giant has many distiguishing features, including the rear-loading ramp, revised sponsons with external tanks and flight refuelling probe.

Some of the many variants of the Sikorsky S-61 family.

Sikorsky S-61N of the Canadian Ministry of Transport, used to airlift men and supplies to coastal lighthouses
Used by the Canadian Coast Guard, this S-61N has full amphibious capability and special air-sea rescue provisions. Visible in this picture is the long-span, strutted tailplane used on certain versions of the S-61.