Hello, I did some online research and now understand that the "Air Position Indicator" allowed to establish longitude and latitude of the own position - but it was only used late in the war and in B-29 aircraft. Which technical devices would have been available to a navigator in a B-24 or B-17 to establish the own position? Why am I asking? Some Missing Air Crew Reports (MACR) give coordinates of aircraft "seen to crash" - how reliable would these be? Are they mere approximations? A navigator could do better than that - or could he? MACR were to be drafted within 48 hours of the incident. One would assume that witnesses of crashes would be fairly diligent in answering questions - it was about the fate of their comrades... I am researching crash sites of B-24 which were shot down doing a supply drop for "Operation Varsity" on March 24th, 1945 over Germany - 14 aircraft were lost that day. Thank you!