It was first called Mosman ; the name was changed because there was a Sydney suburb called Mosman . Mossman is on the Captain Cook Highway , 75 k north of Cairns . Originally known as Mosman â '' the name was changed to avoid confusion with the Sydney suburb of Mosman â '' it is located on the Captain Cook Highway 75 km north of the regional city of Cairns , and 15 km east of the Mount Carbine Tableland .