海道測量師隸屬海事處助理處長／策劃及海事服務，主要負責： (a) 策劃及組織香港水域的海道測量； (b) 統籌測量，以協助疏浚、海洋研究及敷設電纜； (c) 統籌水文數據的收集及整理，用於製作海圖、刊物及其他應用，以符合國際海道測量組織和國際海事組織的標準及規定； (d) 監察海圖及刊物的出版及發行； (e) 指揮運作，以尋找、定位及在海圖編繪香港水域內對航行構成危險的新位置； (f) 監察東亞海道測量委員會區域電子海圖協調中心的規劃、成立及運作；以及 (g) 代表政府出席國際海道測量組織會議及其他國際海道測量會議。

Hydrographer is responsible to the Assistant Director of Marine (Planning & Services) for – (a) planning and organising hydrographic surveying of the Hong Kong waters; (b) co-ordinating surveys in support of dredging, oceanographic studies and cable laying; (c) co-ordinating the collection and compilation of hydrographic data for navigational charts and publications and other applications to meet standards and requirements of the International Hydrographic Organisation and the International Maritime Organisation; (d) overseeing the production and distribution of charts and publications; (e) directing operations to find, position and chart new dangers to navigation in the Hong Kong waters; (f) overseeing the planning, establishment and operation of the East Asia Hydrographic Commission Regional Electronic Navigational Charts Coordinating Centre; and (g) representing the Government at the International Hydrographic Organisation Conferences and other International Hydrographic Conferences.