A P R IL 1959
Vol. 14 No. 4
JO IN T
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)
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
1 0 1
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
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
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
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