6.14.4. Explain and Apply the 1:60 rule

The 1-in-60 rule is used to determine the track error for any distance travelled. 

It is based on the definition that 1nm subtends an angle of 1° at a distance of 60nm. 

The formula for the 1-in-60 rule is as follows:

        60                 =        Track error

Distance gone               Distance off 

6.4.10. Convert between relative, true, magnetic and compass bearings.

True bearing

(Corrected for variation)

Magnetic bearing

(Corrected for deviation)

Compass bearing 

To convert a relative bearing to a magnetic bearing, we need to know the magnetic heading and the relative bearing of a given point. 

Aircraft heading (°M) + Relative bearing = Magnetic bearing to the given point. 

6.4.8. Convert between true, magnetic and compass directions.

True direction – In relation to true North

(Corrected for variation) 

Magnetic direction – In relation to magnetic North

(Corrected for deviation)
Compass directions – In relation to compass North (magnetic North corrected for deviation)

6.14.2(t)  Actual Time of Arrival (ATA). 

Actual Time of Arrival (ATA) is the time the aircraft arrives at its destination or particular point. 

6.4.6(q)  Relative bearing using the clock method. 

A relative bearing is a bearing relative to the nose of the aircraft.

We use the clock-code method to identify aircraft and other features quickly and point them out

Nose = 360° = 12o’clock , 

Right wing = 090° = 3 o’clock 

Tail = 180° = 6 o’clock etc..

6.14.2(s)  Estimated Time of Arrival (ETA); 

Estimated Time of Arrival (ETA) is the time at which the aircraft is due to arrive at its destination or particular point. 

6.4.6(p)  Relative bearing; 

A relative bearing is a bearing relative to the nose of the aircraft.

Nose =360° , left wing =90°  Tail =180° etc..