Commissioned port vessels of the Royal New Zealand Navy from its formation on 1 October 1941 to the present. This includes examination and boom defence vessels, mine defence and degaussing ships and port tugs and tow boats Examination vessels Boom defence vessels In addition there were five smaller boom defence launches. These were in charge of a petty officer and therefore not truly commissioned. Mine defence and degaussing ships In addition another seven smaller launches functioned in mine defence and degaussing roles. Tugs and tow boats See also Current Royal New Zealand Navy ships List of ships of the Royal New Zealand Navy References McDougall, R J (1989) New Zealand Naval Vessels. Page 134–141. Government Printing Office. Auxiliary ships of the Royal New Zealand Navy