Kōrero: Charting the sea floor

Lachlan survey

This film footage outlines the methods and equipment used by the hydrographic ship Lachlan as it surveyed the New Zealand sea floor in 1953. Two sailors fix sextants on two known points: a lighthouse and a mountain peak. This gives them two angles between the landmarks and the ship. The point where the angles intersect marks the ship’s position.

Te whakamahi i tēnei tūemi

Archives New Zealand - Te Rua Mahara o te Kāwanatanga
Reference: W3589/16PP14

Ngā whakaahua me ngā rauemi katoa o tēnei kōrero

Te tuhi tohutoro mō tēnei whārangi:

Lionel Carter, 'Charting the sea floor - Making and using charts', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/video/5949/lachlan-survey (accessed 8 December 2019)

He kōrero nā Lionel Carter, i tāngia i te 12 Jun 2006