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/...