18. LOADING WITH IGNITION CYLINDER.

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b. Precautions. Care must be * * * front of gun. Do not ignite the ignition cartridge until the weapon is to be fired at the target.

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30. AFTER FIRING.

When the firer * * * mission, he should:

a. First, remove and discard the ignition cylinder, as the ignition cylinder should never be present when blowing out fuel or after blowing out fuel except when preparing for a new mission. To remove cylinder, proceed as follows:

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b. Close the pressure-tank valve by turning valve handle clockwise (to conserve remaining pressure in pressure tank) only if additional shots are to be fired before refilling and recharging.