Boom, Mast, stern and parts  Crest For sea-anchor:    https://youtu.be/RZAHZphZca8      Sextant    / ˈsɛkst(ə)nt /      Learn to pronounce           noun   noun:  sextant ; plural noun:  sextants         an instrument with a graduated arc of 60° and a sighting mechanism, used for measuring the angular distances between objects and especially for taking altitudes in navigation and surveying.              Origin     late 16th century (denoting the sixth part of a circle): from Latin  sextans ,  sextant-  ‘sixth part’, from  sextus  ‘sixth’.          A  sextant  is a doubly reflecting navigation instrument that measures the angular distance between two visible objects. The primary  use  of a sextant  is to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation.    THE REAL PICTURES :  The wavewalker:       http://news.bbc.co.uk/local/gloucestershire/hi/people_and_places/...