[6][7] The RCN's then current HO4S-3 utility helicopter could not operate safely in inclement weather with a heavy weapons and sensor load, which would be imperative for the ASW role; hence, a more capable aircraft was needed.

After further studies concluded that the smaller Kaman would better satisfy RCN requirements, the Treasury Board approved an initial procurement of 12 HU2K helicopters for $14.5 million in December 1960.

The Naval Board decided to await upcoming USN sea trials of the HU2K ahead of a final decision.

[11] In the 1960s,[12] the RCN developed a technique for landing large helicopters on small ship decks, using a 'hauldown' winch (called a "Beartrap"),[13] earning aircrews the nickname of "Crazy Canucks".

Each crew consists of two pilots, a Tactical Coordinator (TACCO), and an Airborne Electronic Sensor Operator (AESOp).

The CH-124 has undergone numerous refits and upgrades, especially with regard to the electronics, main gearboxes and engines, surface-search radar, secure cargo and passenger carrying capabilities.

Of the surviving 28 Canadian Sea Kings, nine are destined for museums or to be displayed as monuments, 15 are to be sold, three scrapped, and one retained as a training aid.

NOTE: Last aircraft was retired in December 2018[18][19] Data from [citation needed]General characteristics Performance Armament The Artificial Reef Society of British Columbia is commissioning a full-sized model of the CH-124 to be submerged with the destroyer HMCS Annapolis.