Rear-Admiral Sir David William Haslam KBE CB (26 June 1923 – 4 August 2009) was a Royal Navy officer.

He was in command of Survey Motor Launch 325 in 1947 and then spent two years on exchange service with the Royal Australian Navy from 1947 to 1949.

Back in the United Kingdom, he took command of the new survey vessel HMS Hecla from 1968 to 1970 before becoming Assistant Hydrographer of the Navy in the Ministry of Defence, from 1970 to 1972.

While in charge of surveys in the Persian Gulf, he discovered a series of coral pinnacles now known and charted as Haslam's Patches [1].

Promoted Rear-Admiral on 7 July 1975, he became head of his branch when he took up the historic appointment of Hydrographer of the Navy in September 1975, a position he held, exceptionally, for ten years.