Thanks for the replies guys.
Yeah..it was only me and him there..so he was talking to me.
The Mode C is current, but I guess it does no harm to have it rechecked.
I will try to make an earlier call next time, but sometimes we need to move on fairly short notice.
We got complaints once from an American Eagle ATR that we were in their flightpath...when we where hovering about 5ft over the water to assist a boat, and they were passing us at 1500ft on climbout. ATC knew we were there and had no complaints.
I will try my best to not be a nuisance to airplanes, but sometimes I just don't understand the reasoning....just trying to learn.