Esther Tan

Esther Tan Cheng Yin (; born 1975) is a Singaporean former naval diver and adventure racing athlete who was the first woman to serve in the Naval Diving Unit (NDU). She retired from the Republic of Singapore Navy (RSN) in 2017, with the rank Major.

As Singapore's first female naval diver and an inductee of the Singapore Women's Hall of Fame, she has been called "Singapore's G.I. Jane".

Naval career Tan was educated at Victoria Junior College and studied electrical and electronic engineering at the Nanyang Technological University.

She enlisted to the Republic of Singapore Navy (RSN) in 1995, and joined the Naval Diving Unit (NDU) in 2000, becoming Singapore's first female naval diver. As a naval diver, she specialised in search-and-rescue missions and explosive ordnance disposal. The search-and-rescue operations in which Tan was involved included the recovery of missing sailors after the RSS Courageous collided with a container ship in 2003. She retired from the Navy after 22 years of service in 2017, having held the rank of Major.