Shells can also be divided into three configurations : bursting, base ejection or nose ejection.
2.
Base ejection smoke is usually white, however, coloured smoke has been used for marking purposes.
3.
The most modern is base ejection, which was introduced in World War I . Both base and nose ejection are almost always used with airburst fuzes.
4.
Zeppelins, being hydrogen-filled balloons, were targets for incendiary shells and the British introduced these with airburst fuses, both shrapnel type-forward projection of incendiary'pot'and base ejection of an incendiary stream.
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