4. In enfilading a face of an enemy’s work, what is the object to be fired at?
Usually some point of the interior crest of the parapet which covers a flank of the terreplein to be reached.
5. What is the point of fall?
The point of the terreplein which is first struck by the projectile, after having grazed the interior crest.
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6. What is the angle of fall?
It is the angle made at the point of fall by the tangent to the trajectory with a horizontal line in the plane of fire.
7. How does the angle of fall compare with that of elevation?
It is greater.
8. Upon what do the charge and elevation depend?