Construction began in September 1994. It would train around 2000 divers a year.[1]
It opened in September 1995, being previously at HMS Vernon as the Naval Diving School which joined with the Royal Engineers Diving Establishment.[2][3][4]
It was officially opened in early 1996, with the Sir Charles Pasley pool, by the Second Sea Lord.[5]
At first, training for the Royal Engineers and the Royal Navy was separate. Three years in the RN was required to apply to be a diver, but this policy was dropped in the late 1990s.[6]
The school graduated its first female mine clearance diver on 19 November 2010, 28 year old Lieutenant Catherine Ker. The Royal Navy had changed its admissions policy for women, after the INM had found that women were at no more risk from decompression sickness (the bends) than men.[7]
All candidates must attend the Potential Divers Assessment (PDA). It is a two-and-a-half-day course that is a pass or fail. First, potential divers must pass the Divers Physical Training Test - a 1.5 mile (2.4km) run in 10.30 min, 8 chin-ups, 16 dips, and 40 sit-ups.[15] Candidates will also be physically assessed on:[16]
A 1,000-metre lake swim in a dry-suit and fins
3m and 6m board jumps with in-water circuits
A try dive with self-contained breathing apparatus diving to a maximum depth of 5 metres, in an enclosed dive tank on Horsea Island Lake
The facilities include a 1,000m (1km) salt water lake, a 5m diving tank, recompression chambers, and surface and underwater engineering facilities.[16] The school also possesses two Vahana diving boats based at Whale Island for use in the Harbour and the Solent.[17]
Advanced diver training is conducted at Weymouth, Falmouth, Plymouth and the west coast of Scotland.[16]