This sim was a classic. I first played it in the 1980's on an Atari ST. The scenery was very basic but the cockpit was awesome! I used to fly on instruments most of the time and play with the comprehensive information available on the 3 Multi-Function Displays.
I even managed to play it head to head with two Ataris joined by a null modem cable.
Mark "Frugal" Bush from Frugal's World of Simulations informs me that this was the first sim with a dynamic campaign.