Gnav 1

Anaeroplane flies from A(59°S 142°W) to B(61°S 148°W) with a TAS of 480 kts. The autopilot is engaged and coupled with an Inertial Navigation System in which AB track is active. On route AB, the true track:

• varies by 10°.

• decreases by 6°.

• varies by 4°.

• increases by 5°.

lsogonals are lines of equal:

• compass deviation.

• wind velocity.

• magnetic variation.

• pressure.

"Grivation" is the sum of:

• grid convergence and variation.

• grid convergence and deviation.

• grid convergence, variation and deviation.

• variation and deviation.

How many feet are equivalent to 9.5 km?

• 31160 ft

• 50160 ft

• 57760 ft

• 9500 ft

Grid convergence is:

• named easterly when Grid North appears to be East of True North.

• independent of longitude, depending only of latitude.

• 1 on an equatorial Mercator chart.

• the difference in direction between Grid North and True North.

What is the time required to travel along the parallel of latitude 60°N between meridians 010°E and 030°W at a ground speed of 480 kts?

• 1 hr 45 min.

• 1 hr 15 min.

• 2 hrs 30 min.

• 5 hrs 00 min.

In order to fly from position A(10°00'N 030°00'W) to position B(30°00'N 050°00'W), maintaining a constant true course, it is necessary to fly:

• the great-circle route.

• the constant average drift route.

• a rhumb line track.

• a straight line plotted on a Lambert chart.

The force acting on the needle of a direct reading compass varies:

• directly with the horizontal component of the Earth's magnetic field.

• inversely with the horizontal component of the Earth's magnetic field.

• directly with the vertical component of the Earth's magnetic field.

• inversely with both vertical and horizontal components of the Earth's magnetic field.

"Given: Value for the ellipticity of the Earth is 1/297. Earth's semi-major axis, as measured at the equator, equals 6378.4 km. What is the semi-minor axis (km) of the Earth at the axis of the Poles?"

• 6356.9

• 6378.4

• 6367.0

• 6399.9

The rhumb line distance between points A(60°00'N 002°30'E) and B(60°00'N 007°30'W) is

• 150 NM

• 450 NM

• 600 NM

• 300 NM