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joey_d1119 wrote: |
but these measurement were confirmed by a navel office actually on the ship. |
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It is NAVAL. Navel is your belly button. You have an office in your belly button?
Same with Hangar/Hanger
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There are different methods of measuring a ship's length. The three most often used are Length Overall (LOA), Waterline Length (LWL), and Length Between Perpendiculars (LP or LPP).
LOA accounts for things on a ship which hang over the bow and stern (as a flight deck). LWL is the length of the ship's waterline at standard displacement. LP is a measurement which is more difficult to describe - it is measured from the first vertical frame of the stem to typically the rudder stock.
Each measurement has its own reasons in naval architecture. Whenever you read a ship's measurement you should be aware of the units which are being reported. Any information which you get which does not provide this information should be suspect. If the information is not provided, ask. If they cannot answer satisfactorily then reject their information