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Ships And Small Craft: Armi decks also were introduced in the newer riers.Other ships and small craft.—Besides the principal wars described separately, navies maintain nume auxiliary ships and small craft, including submarine ten (AS), destroyer tenders (AD), oilers (A hospital ships and small craft (AH), attack transports (AI attack cargo ships and small craft (AKA), and ammunition s (AE). Many specialized types of these ve< and various landing craft were developed in < nection with amphibious warfare operation: World War II. More than 100 different tj of landing craft grew out of that conflict, am them infantry landing ships and small craft (LSI), tank lane ships and small craft (LST), and landing craft—persoi (LCP).
The Boat owner who does not have radar can still tap the power of other ships and small craft' radar to enhance the safety of his or her vessel. This is done by installing a passive radar reflector—a simple and inexpensive device consisting of thin, lightweight metal sheets arranged in mutually perpendicular planes. The sheets may fold for storage, but must remain rigid with respect to each other when opened for use. This relatively small reflector (each metal surface is only about a square foot in area) provides a radar reflection almost as strong as that from a medium-size steel ship. Without a reflector, the echo from the fiberglass (or wooden) hull of a small craft is so weak as to be easily overlooked among the echoes from the waves.
With a passive reflector hoisted as high as possible, the operator of a small craft can be sure that his Boat will be detected on the radar screens of passing ships and small craft. Often Coast Guard or other rescue craft searching for a Boat in distress are radar-equipped; the use of a passive radar reflector greatly increases a small craft's chances of being quickly spotted.
By 1933, 31 combination passenger-and-cargo ships and small craft, 9 tankers, and 2 seatrains, aggregating 446,875 gross tons, were completed under the act's provisions. By then, the general depression of the 1930's was in full swing and shipbuilding faced heavy going. In 1934, there were only two oceangoing ships and small craft delivered, tankers which aggregated 9,544 gross tons. Total production of American merchant craft in that year was 66,649 gross tons. The years 1923 to 1935, inclusive, witnessed an average annual American output of 213,080 gross tons of all classifications of merchant craft, and 35,040 displacement tons of naval craft, about 56 per cent of the 1900-1913 average yearly naval output. |
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