I think he means Australian 27mhz marine?
Did you mean 27Mhz Marine?
27.680 Commercial, Calling ship-ship, shore-shore
27.720 Pro. fishing, Calling ship-ship , shore-shore
27.820 Pro. fishing, Calling ship-ship , shore-shore
27.860 Distress,Safety & Calling (supp. to 27.880)
27.880 Distress...