And for those of you who want to know how to see a prawn from the air, it is not really that hard.
Prawns live in big family groups on the bottom. When they up and move as one, they pull up a huge pile of mud from the ocean floor which is easy to spot in tropical azure water.
The trick is (and that is what you spotters get paid a fortune for) is to recognise the differences between the boils of mud created by prawns, against those of fish and tides.
The spotter will record the lat and long on a notepad, or laptop, and radio (scrambled) that to his company's boats on the water.
The Borroloola season only allowed trawling at night (to protect stocks) and the Karumba season was 24 hour.