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sighting angle

   Also found in: Encyclopedia 0.01 sec.
In bombing, the angle between the line-of-sight to the aiming point and the vertical.


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Data recorded included horizontal sighting angle, downward angle to sighting (in reticles), species, group size, orientation of the animals when first sighted, depth, Beaufort sea state, swell height, glare, GPS fix, date, and time.
In a line-transect aerial survey of narwhals in Scoresby Sund, in which the survey plane had flat windows, there were poor sighting rates out to a sighting angle of about 40 [degrees] from the vertical (Larsen et al.
 
 
 
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