I agree with Hot_LZ. Compass to DG as a part of the descent/pre-landing checks will sort the issue for the helicopter. The MRI will not affect the compass unit in the S92 at all if it is in DG mode. A standard procedure for all offshore landings. There is considerably more potential for interference on offshore installations and ships than at a hospital i suspect, which leads me also to wonder if there is another agenda not being aired. Noise possibly? It should certainly be discussed as the S92 is certainly not a quiet machine for those in the vicinity of the landing area (and for that matter anywhere near the approach). I am pretty sure the compass would need to be set to DG for Air Corps AW machines as well, as I think they are equally affected by interference of the magnetic field.
