Gulfstream Jet Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 90; Flight Crew Total 5900; Flight Crew Type 500
Communication Breakdown; Situational Awareness
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Human Factors
While in oceanic cruise flight; we received instruction via CPDLC to contact Shannon Control at a specified time.  VHF radio contact was made at the appropriate time and a normal 'radar identified' message was received with ensuing instructions to proceed after point DOGMA; direct to point NUMPO.  After zooming in my map display; I discovered that we had a two mile right of track offset for SLOP and that we had not removed the offset prior to our Oceanic exit point.  The track message clearly states that SLOP will be removed prior to the Oceanic exit point.  No mention of our not being at the Oceanic exit point was made by the controller and the rest of the flight proceeded uneventfully.  The primary cause of this incident was that only part of the crew was aware of the offset as it was made while the third pilot was off the flight deck in crew rest; and that pilot neither asked for or received a briefing as to the particulars of the current phase of flight.  Better CRM would have prevented this situation; as well as the pilots on the flight deck maintaining a continuing awareness of the fact that a SLOP had been inserted into the flight plan and the need for its removal prior to Oceanic exit.  More thorough inter crew; transfer of flying pilot briefs will be conducted; as well as a review of general basics of Oceanic flying procedures.
Gulfstream Captain discovers after exiting oceanic airspace that the 2 NM SLOP has not been removed as directed by the track message.