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RNLB Emma Constance (ON 693)
RNLB ''Emma Constance'' (ON 693) was a lifeboat〔Ships For All: By Bowen, Frank C: Published by Ward, Lock & Co., Ltd, London and Melbourne: Second Edition〕 stationed at Aberdeen Lifeboat Station,〔Title: ''The Lifeline – The History of the Aberdeen Lifeboat Station 1925 - 1985''. Author: Trewren, Norman. Publisher: 1985 N. Trewren. Work: Chapter 2, RNLB Emma Constance, Page 9 – 15. ISBN 0 9510738 0 X〕 in the Scottish city of Aberdeen from 1927〔Heroes All!, The story of the RNLI, By Beilby, Alec: Published By Patrick Stephens Ltd (1992): Work: Chapter 5, 100 Years On, Page 44. ISBN 1-85260-419-0〕 until August 1951. The lifeboat was designed by James R. Barnett〔Rescue at Sea: By Evans, Clayton: Published by Conway (2003): ISBN 0-85177-934-4〕 who was a consulting naval architect to the Royal National Lifeboat Institution.
== Description ==
The ''Emma Constance'' was a large lifeboat being 61 feet long and 15 feet wide, and was one of only three Barnett class Marks of this size. She had a draught of over 4 feet.〔 These lifeboats were the largest in the RNLI fleet at this time, and over the years has only been surpassed by the 70 foot Clyde-class lifeboats built in the 1960s. The ''Emma Constance'' was built in the yards of Saunders Roe of East Cowes on the Isle of Wight, and was laid down in 1926. She was driven through the water by means of twin screws with their power coming from twin RNLI DE6 petrol engines with each engine housed in its own separate watertight compartment.〔 These two compartments were two of total of fourteen watertight compartments that made up the boat's hull. The lifeboat was able to carry a fuel load of 500 gallons which was distributed between three separate fuel tanks which were at the rear of the engine compartments. There was also an auxiliary petrol engine installed which powered a generator for the lighting the windlass at the front of the boat and a capstan to the back of the boat. Although the ''Emma Constance'' had the most up-to-date technology installed, the designers also covered all eventualities by providing a full set of sails〔 in case of motor power loss. Another feature of this 61 foot Barnett-class was a specially designed jumping net which was supported forward between the two side funnels and two stanchions aft. This net allowed potential rescuees to jump from their ship into the net and then be hauled on to the lifeboat.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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