Not true, Tim!!! I have run the diesel without electrical power to the safety circuits many times! Our little friend from south of the border, Manual Override, can accomplish many things!! And thus, I could still get your butt back home. Slowly, of course, and hopefully not from the extreme end of the fuel supplies' range (9,000 NM X 3 knots = FOREVER!!!)!
Even though the poop thing is mechanical , it's very surprizing how often it confuses both 2 wire and 3 wire 'tricians, weaponettes, and Kevin!!!!
"If you ignore the problem long enough, it will go away. Even flooding stops eventually!"