Terminology from the Age of Sail

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Search result for definition: old measurement
Old Measurement: OM; applies to the measurements of ships built, registered or surveyed prior to 1 January 1836, and in particular to merchant ships of the British Empire. In OM terms a ship was measured for overall length, from fore side of the stem to aftside of the sternpost, and for the beam - outer edge to outer edge across the widest part of the ship. The depth was an inside measurement of the depth of the hold for a single decked vessel, and the total of the space between decks for a multi decked vessel. In Old Measurement, the dimensions are given in feet and inches. Also called BM or Builders Measurement.

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