It seems to me that in the first example it would be the top left aircraft since the gyro shows heading north and it would be in position 1 since the RBI shows that the beacon is directly behind the aircraft.
I don't see how it could be the bottom right aircraft since that one is facing south.
On the second example I think it's the bottom right aircraft in position 6.
The gyro shows a heading south and the RBI shows the beacon to be behind and to the left of the aircraft.
The RBI is always positioned with your heading on top and is showing the position of the beacon relative to you current heading so if the needle is pointing down then it is pointing behind you regardless you what is written on the compass card behind the needle.
Last edited by appleACE; 24th Feb 2018 at 15:43.
Reason: Made a small typing mistake, wrote left when I meant right