The PMO Aurora divided AIMP into groups: acoustic (sonobuoy and acoustic system modernization),
communications management, radios, data link, data management, sensors, navigation, and flight instruments. AIMP was
then divided into four phases or blocks. Block 1 covered replacement/upgrade of HF (high frequency) radio gear,
cockpit voice recorder, flight data recorder, and SRX (speed and range expansion) antennae. Block 2 upgraded the
navigation systems including directional indicators, GPS, inertial navigation system, autopilot, radar altimeter,
transponder, and ACAS (collision avoidance). Block 3 upgraded communications (VHF / UHF radios, SatCom radio),
Data Management System, and sensors (imaging radar, E/O, MAD (magnetic-anomaly detection) system, etc.). Block 4 was
to include DEWS (defensive early-warning system) and a stand-off air-to-surface missile system (extended
range Harpoon has been mentioned in the past). Blocks 1 through 3 were substantially complete when AIMP was
cancelled and will still be implemented, but block 4 was never approved.
 A general description of CP-140 Aurora sensors and systems will be included on our Aurora
Incremental Modernization Project page.
 The US military designation is used. Current CP-140 engine is the T56-A-14-LFE – military version of
the civilian 501-D22A turboprop. The full military rating is shown. The civilian power rating is 3362kW (4508shp).
The T56 was an Allison design, now part of Rolls-Royce.
 A typical crew consists of 2 pilots, 1 flight engineer (FE), 4 navigators (Air Nav), and 3 Airborne Electronic
Sensor Operators (AESOp). Air Nav responsiblities are: one for navigation and communication duties, one for tactics,
and the other two operate the acoustic sensors.