sighting angle


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sighting angle

[′sīd·iŋ ‚aŋ·gəl]
(ordnance)
In bombing, the angle between the line of sight to the aiming point and the vertical.

sighting angle

An angle between the line of sight to the aiming point and the local vertical at the time of a bomb release. Also called a dropping angle.
References in periodicals archive ?
Single-observer line-transect methods were used, including the recording of sighting angles by hand-held clinometer.
For a small number of groups, sighting angles were not recorded and therefore distance from the transect centerline was unknown.
Sighting angles were recorded by using angle boards (see Buckland et al., 1993) in the first season, and thereafter with the compasses in the binoculars.
The data were truncated at 6000 ft (1829 m) from the trackline; beyond this distance, sightings were few, and measured sighting angles and counts of numbers were imprecise.
Sighting distances were grouped, because the observers tended to round sighting angles. The last-digit frequencies of the recorded angles were analyzed, and it was found that rounding to the nearest 5 [degrees] was mostly at the expense of the adjacent marks, i.e.