A gyromagnetic compass or heading reference unit is an assembly which always consists of :1- a directional gyro2- a vertical axis gyro3- an earth's magnetic field detector4- an azimuth control5- a synchronising controlThe combination regrouping all the correct statements is :

1) Which one of the following is an advantage of a remote reading compass as compared with a standby compass?

2) A gyromagnetic compass or heading reference unit is an assembly which always consists of :1- a directional gyro2- a vertical axis gyro3- an earth's magnetic field detector4- an azimuth control5- a synchronising controlThe combination regrouping all the correct statements is :

3) If the rhumb line track from Turn (45N 008E) to khartoum (15N 032E) is 145oT, what is the direction of the great cirlce track measured at Turn?

4) A Southern Lamberts conformal conic chart is overprinted with a false grid aligned with the 1800W meridian. The constant of the cone is 0.843. If the true track at 1450E is 3330 will the grid track be:

5) North polar stereographic chart is overprinted with a false grid. At 770N 370W the grid track is 1750 and the true track is 0930. At which longitude is the false grid aligned?