Shearwater Heliport, formerly known as Canadian Forces Base Shearwater and commonly referred to as CFB Shearwater and formerly named HMCS Shearwater, is a Canadian Forces facility located 4.5 nautical miles east southeast of Shearwater, Nova Scotia, on the eastern shore of Halifax Harbour in the Halifax Regional Municipality. Following a base rationalization program in the mid-1990s, the Canadian Forces closed CFB Shearwater as a separate Canadian Forces base and realigned the property's various facilities into CFB Halifax. These include:Shearwater Heliport, which is operated by the Royal Canadian Air Force. The primary RCAF lodger unit is 12 Wing, commonly referred to as 12 Wing Shearwater. 12 Wing provides maritime helicopter operations in support of the Royal Canadian Navy's Atlantic Fleet (MARLANT) from the Shearwater Heliport and Pacific Fleet (MARPAC) from the Patricia Bay Heliport in British Columbia. 12 Wing is also headquartered at Shearwater Heliport. Shearwater Jetty, the former CFB Shearwater Annex, which provides dock facilities in support of Fleet Diving Unit Atlantic and MARLANT warships.

Halifax Harbour is a large natural harbour on the Atlantic coast of Nova Scotia, Canada, located in the Halifax Regional Municipality. Halifax largely owes its existence to the harbour, being one of the largest and deepest ice-free natural harbours in the world. Before Confederation it was one of the most important commercial ports on the Atlantic seaboard. In 1917, it was the site of the world's largest man-made accidental explosion, when the SS Mont-Blanc blew up in the Halifax Explosion of December 6.