Gyro Nav
A black art as far as I as a driver was concerned. Ac locked to heading bug, bug nowhere near top of HSI. Nav changing grids! Too confusing as a compass was put to mag then compass swung to new grid etc - go for a walk in freight bay then come back when all was sorted. Don't give me a heading to fly just tell me so many degrees to right or left. Did approaches into Resolute Bay and Hall Beach with compasses on all sorts of settings, heading bug somewhere around the 8 o'clock position on HSI and my track line coming in from behind ac symbol. approach plates on True North. 25 or so degrees West degrees of deviation! Night. Nav chuckling. Thank heavens for ADF/NDB pointing towards the field as otherwise I had no way to tell which direction I was pointing or which way to turn.