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Use the box below to search for a specific Term |
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| There are 49 entries in the glossary. |
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| Oakum | A material made of tarred hemp or manila rope fibers, used for caulking seams of decks and sides of a wooden ship in order to make them watertight. |
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| Oar | A pole with a blade at the end used to row a rowboat. Oars are different than paddles because they have a provision to be secured to the rowboat for rowing, such as an oarlock. The three parts to an oar are: the blade, the part which enters the water; the shaft, the main body of the oar: and the loom, the inboard end on which the rower pulls. |
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| Oarlock | A device to attach oars to a rowboat, allowing the operator to row rather than paddle the boat. |
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| Observed Position | A position or fix determined by observing landmarks or other objects to find the position. |
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| Occulting Lights | A navigational light which turns on and off in a regular pattern, but is on more than it is off, so the period of light is longer than the period of darkness. |
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| Off and Fair | Order to take off a damaged part of a vessel, to restore it to its proper shape and condition, and to replace it in position. |
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| Off Soundings | In blue water beyond the 100-fathom line. |
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| Off the Wind | Sailing with the wind coming from the stern or quarter of the boat. |
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| Officer | Any of the licensed members of the ship's complement. |
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| Officers Mess | Dining room facilities for officers separate from the crew and passenger dining room. |
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| Official Number | Definition and cross-reference to Tonnage. |
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| Offing | Seaward, a safe distance from shore; To keep an offing is to keep a safe distance away from the coast because of navigational dangers, fog, or other hazards. |
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| Offshore | Away from land, toward the water. |
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| Offshore Wind | Wind blowing from off the shore. |
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| Offwind | Any point of sailing away from the wind. |
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