Definition Noun A strong vertical post, either shore-side or aboard a vessel, for securing hawsers and mooring lines. Origin 14th century. Likely from the Old
A modern Iranian-made astrolabe (left). (By Jacopo Koushan (User:Jacopo188)Photograph by Masoud Safarniya (User:M.safarniya) – Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=26080692). A mariner’s (AKA sea) astrolabe
Definition Noun Various policy directives promulgated throughout the Navy by Admiral Elmo Zumwalt while serving as the Chief of Naval Operations (CNO). Origin Modern times.
Definition Noun A privately-owned pleasure boat. Origin 17th century. Several possible sources, but probably from the Dutch, jacht, and the later jagt. From their word
Definition Abbreviation eXpendable BathyThermograph. A device that measures the water temperature at various depths which can be used to predict differences in sound velocity and
Definition Noun A device for hoisting an anchor. Origin Probably earlier than the 17th century. Earlier spelling was windelas. From Middle English, windas, of the