Any Unknown or Unlisted Aircraft Manufacturer
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Communication Breakdown
ATC Issue All Types; Conflict NMAC; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Airport; Human Factors
On taxi-out to Runway 5 we made a radio call stating aircraft type and runway of intended departure. Upon reaching the hold short line we contacted Air Traffic Control for IFR clearance; and waited for release time for takeoff. Hold short line faces approach end of Runway 5; but does not allow pilot to view departure end of runway for on-coming traffic. After copying clearance we switched back to CTAF frequency and continued to monitor the frequency. Upon moving the aircraft we announced taking Runway 5 for takeoff and intended direction of departure. As we took the runway and started takeoff roll we encountered an aircraft on short final for Runway 23. This aircraft had not made any traffic calls and was difficult to see on the hazy background of the sky. Aircraft executed a missed approach and re-entered the pattern for Runway 5. I failed to make an abort decision at the appropriate time and continued with the takeoff and departure. Jeopardizing safety in the process.The cause was inadequate communication used by both aircraft; white aircraft on similar background and poor illumination of landing aircraft to be seen. Inadequate decision making by Captain of departing aircraft and failure to abort the departure. Ways to avoid this would be for all participating aircraft to be communicating effectively and for all aircraft to monitor the frequency and flow of traffic. Other avoidance measure would be to have an ATC facility present at the airport and better positioning of the hold short line for both sides of the runway to be seen.
Pilot reported NMAC during takeoff from a nontowered airport.