Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 0; Flight Crew Total 752; Flight Crew Type 530
Situational Awareness; Physiological - Other; Communication Breakdown; Training / Qualification
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Became Reoriented
Environment - Non Weather Related; Human Factors
The clearance on takeoff was 'Cleared for takeoff; fly heading 100 and climb to 4;000 feet. When handed off to Departure Control; I checked in and reported; erroneously; that we were 'climbing via the ZZZZZ 3 RNAV except maintain 4;000 feet.  The Captain/Pilot Flying did not actually deviate from the clearance; I just reported it wrong. ATC then asked for clarification; if we were flying the SID. I replied 'correction; we are on a 100 heading; climb to 4;000 feet. We were then given an additional turn to 070 heading; as well as an additional climb to 16;000 feet.This was my first leg of OE after nearly eight months without flying due to the COVID schedule reductions.
Doing an OE with Requalification First Officer. First leg of trip. Everything was SOP up until the point of check-in with ZZZ Departure. I was the PF and the OE pilot was the PM. Original clearance was the ZZZZZ1; we had a CDR on taxi out which changed us to the ZZZZZ 3. Tower assigned a 100 Heading and to maintain 4;000 feet. We set 100 HDG and deselected LNAV. I flew the 100 HDG and maintained four thousand. Upon check-in with departure; the PM stated altitude and we were climbing via the ZZZZZ 3. ATC then cleared us to 6;000 feet; which we set per SOP. We deleted the 5;000 below restriction and climbed to six in VNAV. Shortly after; ATC quired if we were on the ZZZZZ as we were almost on a direct line to ZZZZZ4 and to climb and maintain 16;000 feet. The FO read back we were on a heading of 100; not the ZZZZZ.ATC stated to turn left to 070. I had FO verify we were still cleared to 16;000. We continued climb on a 070 HDG until cleared to ZZZZZ5 on course.
Air carrier flight crew reported the First Officer (PM) read back the wrong clearance to ATC during departure causing confusion. The First Officer cited lack of flying contributed to the event.