FIRING AT MOVING OBJECTS. 
471 
“ Fire all loaded guns 55 . — This command is unnecessary if next 
— objective is at a shorter range. 
Change target or follow the retreating enemy as follows :— 
Words of command. Result. Remarks. 
“ 1200 yards, fuze 54, shot ” + 
“shot”... — 
“ Rapid fire ” . — 
Stand fast ” (whistle) . 
Fire all loaded guns ” .. 
• I i 
i 
1400 yards, fuze 64, shot” .. 
. + 
“ shot ” .. 
. + 
" shot ” .. 
_ 
Rapid fire” ... 
. - 
&c. 
In the above example, if time shrapnel be assumed to burst regularly 
60 yards short of point of impact of unburst projectile, the first 
shrapnel on graze after each change of range would be 85 yards short, 
and the first time shrapnel 115 yards short. 
If the shrapnel be assumed to burst 100 yards short of point of 
impact of unburst projectile, the first shrapnel on graze would be 45 
yards short, the first time shrapnel remaining 115 yards short as 
before. 
The infantry is assumed to advance steadily at 100 yards per minute, 
but in reality infantry would hardly maintain their maximum rate 
while under heavy fire. If the rate under fire is taken to be half the 
above there will be time for 33 rounds at each range, of which 28 will 
be effective shrapnel. If ordinary fire is used there would be time for 
15 rounds. 
The range is never changed until at least two rounds are +, as there 
is always the chance of the first being due to a fuze having been incor¬ 
rectly set causing the shrapnel to burst on graze. 
