Presentlly selling some B737NGs on behalf of a third party and been asked the following questions by potential buyer which, clearly being v thick, I don't understand and vendor's tech. rep unavailable. Any help much appreciated:
"What type of cockpit display is installed, EFIS or PND/ND?" (obviously EFIS but what's the PND/ND all about?) and
"Is ISFD installed?" (Wot's ISFD?)
Thanks
