The CP-140 Aurora came into service in 1980, to replace the aging
Argus. Using the old Lockheed Electra airframe with new turboprop engines,
and based on the USN's P-3 Orion maritime patrol aircraft, the Aurora was
fitted with the more advanced anti-submarine sensors from the USN's Viking
carrier borne ASW aircraft. The name, Aurora, was taken from the name of
the Goddess that restored Orion's eyesight. In 1991, the last three Orion
airframes were bought off the assembly line in California and were pressed
into service as the CP140A Arcturus aircraft; sporting a very similar airframe,
these three planes do not have the ASW sensors found in the Aurora, and are
used primarily for pilot training and sovereignty patrols. It is difficult
to visually tell the difference betwen the two types of aircraft, as the
Arcturus retains the MAD boom, although it is empty.
Auroras have operated extensively within Canada, and have also operated
in support of Operation Apollo in the Persian Gulf and Northern Arabian Sea
since 2001.
This reduced flight hours on the airframes of the more capable Aurora.
Currently (2005), the Aurora aircraft are undergoing extensive upgrades to
extend their lifetimes, while the Arcturus will eventually be retired.