This Airborne Early Warning and Control variant of the P-3 was nicknamed Sentinel. Eight P-3Bs were converted into AEW&C aircraft, but although the Orion is globally succesful, this variant was never exported. The P-3 AEWs are used by US Customs and Border Protection's Air and Marine Operations for drug interdiction and homeland security missions. This N91LC (BuNo 155299) became N145CS with the CBP.

This Airborne Early Warning and Control variant of the P-3 was nicknamed Sentinel. Eight P-3Bs were converted into AEW&C aircraft, but although the Orion is globally succesful, this variant was never exported. The P-3 AEWs are used by US Customs and Border Protection's Air and Marine Operations for drug interdiction and homeland security missions. This N91LC (BuNo 155299) became N145CS with the CBP.

Ex RAAF A9-299. P-3B with CBP departs in the afternoon off runway 32 as TROY077. Has US Customs and Border Protection titles and large US Department of Homeland Security badge on the tail. Also has "Air and Marine Operations" titles on the rear fuselage.