John Breed, Diary and Training diary, item 72

• March 27, 2017 03:07:40 Cheryl Ellsworth

  Line of Fire; A line joining the muzzle of the piece

  and the point aimed at

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  Note; This term should be used instead of the

  preceding one if firing from behind cover or

  in any case when the sights of the piece

  are not used

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  Plane of Sight; The vertical plane passing through

  the line of sight

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  Angle of Sight; The angle which the line of sight

  marks with the horizontal plane

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  Angle of Elevation; The angle which the line of sight makes

  with the axis of the gun

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  Quadrant Angle the angle which the axis of the gun

  makes with the horizontal plane. It

  is  termed Quadrant Elevation or depression

  according as the gun is laid above or

  below  the horizontal plane

Description