Securite (Safety). A radiotelephone message prefixed by the spoken word, 'say-cur-ee-tay', indicates that a message concerning the safety of navigation or giving important meteorological warning is about to be made.
Seel. The roll of a vessel at sea.
Segmental Bar. Rolled steel having section that is semi-circular, or nearly so.
Segmental Strip 301 Semi-diurnal Tides
Segmental Strip. Rolled steel section with lower side a chord of a circle, the upper side being an arc appreciably less than a semicircle.
Seiche. Short period oscillation in level of enclosed, or partly enclosed, area of water when not due to the action of tide-raising forces.
Seine. Long fishing-net, 60 fathoms or more, in the form of a bag. About 8 to 16 ft. deep. Upper end is buoyed, lower end is weighted.
Seine Boat. Craft for fishing with seine net.
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