Recognition Journal, Volume 14 No. 4 April 1959

A P R IL 1959 Vol. 14 No. 4 co.Mivvrs JO IN T SERVICES ji^ioNS£S< RECOGNITION JOURNAL The Joint Services Recognition Journal is a monthly publication produced in the Department of the Assistant Chief of the A ir Staff (Training), A ir Ministry, and prepared in collaboration w ith the Adm iralty, the W a r Office and the M inistry of Supply (A ir Technical Publications). Applications for copies can only be accepted from the Services or other official bodies, and must be submitted through the normal official publications supply channels— n o t to the Editorial Office or direct to the A ir Ministry. T h e Jo u rn a l is p rod u ced so le ly fo r o fficial use and can n o t be sold to m em b ers of th e pub lic. Contributions and correspondence should be addressed to the Editor, Joint Services Recognition Journal, A ir M inistry. Richmond Terrace, W hitehall, London, S.W .1. F e a tu re Super-Tanker “ Caltex Rotterdam” (cover) ... *Try This For Size ! Ship Shop .................................................. *Birds Of A Feather (Devon and Heron) *Mach-Busters (Crusader and Super Sabre) Briefs The Eternal Triangle (deltas spotting test) *Rotary Club (Sycamore, Dragonfly and Widgeon) Blowlamp— an impression by Frank W ootton *W h o ’s W h o — 1: Blowlamp and Vautour ... Soviet Circus— 7: Blowlamp ... *Short Sea Traders ... .......................... *Crate and Convair 340 ... *Exercise “ Skyline O ne” (JS-3, T-54 and Conqueror) Solutions to Lessons and Tests * Identification Lessons Pag e 85 86 87 88 90 93 94 96 98 100 1 0 1 102 106 108 112 SHIP SHOP T HE important things in identifying a merchant ship are to distinguish her basic type and to estimate her size. It is not necessary to name ships individually, although this ability soon begins to come as experience grows. In various weather conditions merchant ships can be deceptive as to size and type, particularly when seen from the air; incidentally, the general tendency is seriously to over-estimate the size of a ship. When at sea, there is nothing except the ship's own features to give the scale and it is the appreciation of the relative sizes of these features which is important in estimating size. In both recognising and size estimating, quite a lot of valuable experience can be gained from the correct use of photographs, and on the opposite page is a lesson on size estimating with instructions on how it might be done— or, at least, started. The method of deducing size suggested in that feature is not the only one, and readers will find others for themselves which may well suit them better. Such methods may seem slow and laborious at first, and are certainly not practicable for operational use. They are however extremely valuable training-wise since they cause the eye to rove over features, estimating proportions, and generally to get the “ feel ” of ships. With practice in this way, the mental process of appreciating size becomes shortened and quickened and the laborious paper and pencil plotting methods can be discarded. There arc approximately 55,000 merchant ships afloat today. Fortunately there are not more than about 30 basic types which it is necessary to know and though enough, getting to know them is not a formidable task. However, as individual types can range considerably in size, learning to estimate size requires rather more and special experience. Merchant ship lessons in the Journal (as well, incidentally, as those on aircraft, warships and tanks), arc so arranged that both the beginner and the experienced student can, if the instructions are carried out, gain experience from them. b u i-to J i J L j i * L i The silhouettes have all been made the same size to emphasize the differences o f character between ship types 87 A p r il 1959
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