Question 1354Navigation General

The correct answer is A) declination. The GP (Geographic Position) of a body for a high altitude sight is determined from the Greenwich Hour Angle (GHA) and the declination of the celestial body. The declination is the angular distance of a celestial body north or south of the celestial equator, which is the key factor, along with the GHA, in calculating the GP. The other options are incorrect because: B) azimuth angle is not used to determine the GP. C) the circle of equal altitude is not a factor in calculating the GP. D) the zenith distance is also not used to determine the GP.