|Demonstrate:||Method:||Points to emphasize:|
|1. Service burst.||Fired at stop-butt. Belt spaced.||Importance of service burst and time to fire.|
|2. Rates of fire.|
|Belt not spaced. Fired at stop-butt.||Time for maintenance between bursts.|
|(b) Rapid.||Belt not spaced. Fired at stop-butt.||Time only for quick check of aim between bursts.|
|3. Volume and accuracy.||100 rounds straight at screen.||Size of group and volume of fire.|
|4. Factors affecting accuracy.|
(a) Tripod not stamped in.
|100 rounds at screen.||Compare size of group in each case.|
|(b) Tripod stamped in.||100 rounds at screen.|
|(c) Loose jamming bolt.||Prepare tripod by loosening jamming bolt and tumbler nut. 50 rounds straight at screen.|
|(d) Punch fired.||50 rounds straight at screen.||Emphasize that human element does not affect accuracy.|
|(e) Recruit fired.||50 rounds straight at screen. Gun to be laid and loaded by instructor.|
(a) Rapid engagement of targets.
|3 coloured plates on stop-butts, sufficiently spaced to necessitate the use of the clamp in one switch.||Speed with which targets can be engaged.|
|(b) Swinging traverse.||1 belt along stop-butts Condenser tube to be removed from can to show amount of steam given off.||Used in an emergency only. Rate of traverse 1 yd in 2 secs at 25 yds.|
|6. Muzzle blast.|
(a) Ashes down, blast deflector off.
|2 spaced bursts.||Compare amount of dust caused by blast.|
|(b) Wet sacks down.||2 spaced bursts.|
|(c) Blast deflector, no wet sacks.||2 spaced bursts.|
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