There are vision targets on the lift peg. The specifications for the targets can be found in section 3.13 of the game manual.
Quote:
There are also vision targets on both sides of each LIFT peg. The peg targets are 2 in. (~5 cm) wide by 5
in. (~13 cm) tall rectangles located 10¾ in. (~27 cm) from the carpet and spaced 10¼ in. (~26 cm) apart
(outside dimensions).
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You could also potentially use a light sensor to sense the black baseline in front of the airship.
I can't help that much, as this isn't really my thing.
But basically, there are uses for sensors.
I hope this helps at all.