 The services provided by MAC are similar to those carried out by land-based police, including crime prevention and detection, search and rescue and high visibility patrols.Police vessels and personnel are strategically located at important commercial and leisure ports and harbours along the New South Wales coast, with headquarters at Balmain in Sydney Harbour.They are also based at Broken Bay, Newcastle, Port Stephens, Coffs Harbour, Botany Bay, Port Kembla and most recently Eden.