Fortunately the vessel's radio had a backup power supply that allowed it to continue working even when the rest of boat's battery-supplied electricity had failed.
(the rest of boat's battery-supplied electricity; had failed; ) (a backup power supply; allowed; it to continue working even) Context(a backup power supply allowed,List([35, 69))):(it; to continue; working even when the rest of boat's battery-supplied electricity had failed) Context(a backup power supply allowed it to continue,List([35, 84))):(it; to continue working even when the rest of boat's battery-supplied electricity had failed working even; )
a backup power supply allowed,List([35, 69)) a backup power supply allowed it to continue,List([35, 84))
the rest of boat's battery-supplied electricity a backup power supply it it
had failed allowed to continue to continue working even when the rest of boat's battery-supplied electricity had failed working even
it to continue working even
working even when the rest of boat's battery-supplied electricity had failed