When loading aviation fuel on marine tankers we were required to ground all transmitting antennas (MF & HF) up to 2KW however I do not recall any limitations to the use of the ships VHF transmitter (25W). There was however prohibition on using hand-held units on deck (VHF & UHF) as they were not classified as intrinsically safe under loading conditions. There would have been a considerably greater venting of vapour here than fueling an aircraft however because of loading at 10,000 tph.