No, I believe the modifications had to be done to the satellites to allow them to pick up the specific VHF tx from the ships AIS - duplex channels of 87B and 88B I think.
that will be the GPS Rx but where is the VHF Tx aerial for the AIS?
Great idea to have the EGPWS disabled at 70 kts - just the sort of speed you are doing a trans down to the hover and possibly getting close to obstacles/land.
VHF Tx just forward of the ramp on the belly.