Commercial Fixed Wing
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Last 90 Days 5.87; Flight Crew Type 4571.13
Distraction; Situational Awareness
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural FAR
General None Reported / Taken
Human Factors; Procedure; Environment - Non Weather Related
Established on the F track and just prior to exiting radar service we instituted a 2 mile right offset as a SLOP.  This seemed routine to us until ATC asked if we were still on track to our next waypoint.  It then occurred to us that we should have not instituted SLOP until we were out of radar contact.  Both of us have flown very little this past year and although we are both veterans at flying [in State X]; the SOP here just did not properly come to mind.
Air carrier Captain reported a track heading deviation during cruise after instituting a 2 mile right offset as a SLOP while still under radar contact. Captain cited lack of flying as a contributing factor.