A light house of 120 m height is just visible above the horizon from a ship. The
correct distance (m) between the ship and the light house considering combined
correction for curvature and refraction, is
The lengths and bearing of a closed traverse PQRSP are given below.
The missing length and bearing, respectively of the line SP are
The magnetic bearing of a line AB was N 59° 30' W in the year 1967, when the declination was 4° 10' E. If the present declination is 3° W, the whole circle
bearing of the line is
The local mean time at a place located in Longitude 90° 40lE when the standard time is 6 hours and 30 minutes and the standard meridian is 82°30lE is