I flew the SAR chopper at Willytown many yonks ago and one day was patrolling the beach along Stockton Bight towards the north. I might've been a couple of hundred feet high, when a black triangular shape appeared in front of and below me going like the clappers across the bight. Shocked the bejeezus out of me.
The noise hit a second later and some wake turbulence and by the time I realised what it was it was disappearing north east right on the wave tops. I knew who it was, this particular chaps signature was ultra low flying and later we discussed it in the bar over several ales.
Regards,
BH.