Fridays Australian, contained a story about certain operaters doing flights to check out anti-whaling operations in the Southern ocean last summer.
www.theaustralian.com.au/business/aviation.
Seems to be much confusion within CASA how far operaters can operate out to sea without an international AOC.
So do you require an international AoC for fishspotting in C337 when operating 100 miles of the coast of SA, flying to the Tiwi Islands, flying into Sydney in PA-31 if you get taken out to sea for runway 25 ILS, what about between say Merimbula and Flinders Island, what about chasing yachts in the Sydney to Hobart yacht race in a helicopter?