quote from Robert 99:
You are 100 percent correct that the only indication that Cooper wanted maps was that one line Tina remark. The only maps that Al Lee sent to the airplane were in the same box as the crew meals and were aeronautical charts and approach plates that the flight crew needed to get to Mexico. Cooper did not see those maps and did not discuss them with the flight crew. And Cooper didn't say anything about the flight south that would require him to look at or discuss maps with the flight crew.
D.B. agreed to let them refuel in Reno with no hesitation. He didn't need to reference a map then... I don't think D.B. was interested in a map. I think Tina's remark may have been in reference to the navigational charts(that the flight crew probably asked for?) that you mentioned earlier.
I wonder which member of the flight crew had to do the plotting ( would the crew be doing the fuel calculations also ? ) For whatever it matters, might Tina have seen this flight crew member doing calculations( maybe with the charts being confused by Tina as being maps). Wouldn't this flight crew person be doing these calculations outside the cockpit area ?
And there in a nutshell is the issue. What calcs did he make or have to make - what was the route(s)? - what was the flight path on or off V23? It seems to me a little pointless to wonder about calcs someone made when we dont even know what the route was (for sure) from SEA to Portland. That is the matter being debated. It wuld appear to me he didn;t have to make too many cals because ATC (R2 etc) was guiding him the whole way based on a number of variables like (intercepts - and who knows what). They had been told they could do 'whatever you want' and were getting real-time guidance from ATC controllers. So what "calculations" were needed or came into play?
According to the Transcripts the only significant thing being 'calculated' was fuel consumption vis-a-vis air speed, flap settings, and possibly drag ?
The flight engineer would take care of the fuel calculations to make sure they had a sufficient amount to get to Reno (actually the performance engineers in Minneapolis told them when they were in the Portland area that they had adequate fuel to get there) and he would move fuel from tank to tank as needed to keep the center-of-gravity in the right place.
The pilots would not need to calculate much of anything. They were flying at a specified altitude with the flaps at a designated setting. When they were on V-23 and doing their own navigation between VORTACS, their DME would give them their ground speed and the distance between the VORTACS was listed on those aeronautical charts. So it was just a simple matter to calculate their time over the next VORTAC.
When bypassing Portland and when flying off-airways between the Red Bluff VORTAC and Reno, the air traffic controller would be responsible for the navigation although the flight crew would undoubtedly be double checking him on their own instruments.
Overall, things would be quite simple.