heres a paragraph cut from MSQ site:
EPIRBs (Emergency Position Indicating Radio Beacons)
All ships operating beyond smooth and partially smooth waters must carry a 406 MHz digital EPIRB if more than two nautical miles from land.
Moreton Bay is smooth and partially smooth waters
look here for borders of smooth partially smooth and open waters
http://www.msq.qld.gov.au/~/media/e0...sw1brissth.pdf
http://www.msq.qld.gov.au/~/media/69...2_2_brisnt.pdf