The Naval Diving Unit (NDU) is a special force of the Republic of Singapore Navy, and is regularly tasked in salvage operations, underwater mine demolition and commando-type warfare.

Basic training includes Drown Proofing Training, Pool Competency, Fast Roping, Improvised Explosive Device Disruption, Underwater Mine Disposal and Explosive Ordnance Disposal. NDU divers are also regularly sent overseas for training, in particular, with the US Army's elite Green Berets, US Navy SEAL and the British Special Air Service. In 2001, naval officer Wong Foo Chan became the first foreigner to top his class in the Green Berets course, and received a commendation medal for this achievement. He had also completed the Navy SEAL course in 1999.

NDU divers were sent to conduct salvage operations after the crash of Silkair Flight MI185 on 19 December 1997, which killed all 104 people on board.

Related topics

• Special Tactics and Rescue Unit (Singapore)
• Singapore Special Operations Force (SOF)
• List of special forces units