Online Encyclopedia


Online Encyclopedia
Originally appearing in Volume V16, Page 604 of the 1911 Encyclopedia Britannica.
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DOPY PLAN. MIDSHIP SECTION. A, Deck. C, Side air-cases above deck. B, Relieving valves for auto- E, Wale, or fender. G, Water-ballast tanks. matic discharge of water off deck. coasters and fishing-boats have in great measure disappeared, their places being taken by steamers and steam trawlers. The cost of the building and equipping of pulling and sailing life-boats has materially increased, more especially since 1898, the increase being mainly due to improvements and the seriously augmented charges for materials and labour. In 1881 the average cost of a fully-equipped life-boat and carriage was £6so, whereas at the end of 1901 it amounted to £1000, the average annual cost of maintaining a station having risen to about £125. The transporting-carriage continues to be a most important part of the equipment of life-boats, generally of the self-righting type, and is indispensable where it is necessary to launch the boats at any point not in the immediate vicinity of the boat-house. It is not, however, usual to supply carriages to boats of larger dimensions than 37 ft. in length by 9 ft. beam, those in excess as regards length and beam being either launched by means of special slipways or kept afloat. The transporting-carriage of to-day has been rendered particularly useful at places where the beach is soft, sandy or shingly, by the introduction in 1888 of Tipping's sand-plates. They are composedof an endless plateway or jointed wheel tyre fitted to the main wheels of the carriage, thereby enabling the boat to be transferred with rapidity and with greatly decreased labour over beach and soft sand. Further efficiency in launching has also been attained at many stations by the introduction in 1890 of pushing-poles, attached to the transporting-carriages, and
End of Article: DOPY PLAN
JOHN DORAN (1807-1878)

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