In recognition of 5(AC) Squadron's Lincolnshire base, the Sentinel R1s display the City of Lincoln coat of arms on the port side of the nose. They also sport the 5(AC) Squadron crest - a green maple leaf on white disc centred in a red band, on the fin - although the aircraft are also used by 54(R) and 56(R) Squadrons.

In recognition of 5(AC) Squadron's Lincolnshire base, the Sentinel R1s display the City of Lincoln coat of arms on the port side of the nose. They also sport the 5(AC) Squadron crest - a green maple leaf on white disc centred in a red band, on the fin.

To offset the destabilising effects of the antennae fairings the fin height has been increased and two underfuselage strakes have been added.