The captain stated that he had a 170 magnetic heading to Marab?( in reality it was Goi�nia ), and that he was receiving a bearing from the Caraj�s beacon ( which actually was the Barra do Gar�as beacon ).
22.
At uncontrolled airports, pilots are recommended to broadcast their intentions while backtracking in the interest of safety, for example " Entering and backtracking runway 36 " would indicate the aircraft is taxiing along a magnetic heading of 180 degrees, against the flow of traffic.
23.
The formula to determine the compass heading to an NDB station ( in a no wind situation ) is to take the relative bearing between the aircraft and the station, and add the magnetic heading of the aircraft; if the total is greater than 360 degrees, then 360 must be subtracted.
24.
At 08 : 15 : 32 UTC, it reached Advent and entered a base turn, reaching a magnetic heading of 160?at 08 : 16 : 28 UTC . While the crew had adjusted for the wind drift, they did not attempt to intercept the magnetic course 155?outbound from Advent.
25.
The computer is powered up and nulls its velocity shafts; the gyros are powered by 115V and 400 Hz and revving up; the platform is leveled in pitch, inner and outer roll relative to the aircraft using the gimbal synchrotransmitters; and the azimuth axis is driven to the grid north direction using the magnetic heading sensor.
