554 RANGE OFFICER. 
(5). When a round is fired the range officer holds his cardboard 
so that the scale is parallel to the line of fire, and with the 
edge of the target opposite the centre division of the scale. 
He notes whereabouts on his scale the projectile appears 
to fall and, by counting off the divisions right or left from 
that which is opposite the target, he can tell almost exactly 
the distance ‘short’ or ‘over’ of the round. He must, 
of course, remember to keep his arm extended while using 
the scale and, if the range-boat or target moves its 
position he must make a fresh scale, but this only takes 
about 2 minutes. or example, if the height of the target 
is 6 feet he has a scale of yards or feet to show 2 yards 
or 6 feet or less if he chooses to sub-divide it: the scale 
should be numbered outwards from the centre division and 
would look something like the following :— 
20 18 
ao b 18 14 12 10 8 4 6 &8 10 12 4 16 YARDS 
€ 
6 4 2 0 2 
YARDS 1 || 1 | T qs T & 
CENTRE DIVISION 
ab is the apparent height of the target (say 6 feet) as found by 
par. 3. 
