CPC E04G 1/15 (2013.01) [B64F 5/00 (2013.01); E04G 2001/157 (2013.01); E04G 2001/242 (2013.01)] | 20 Claims |
1. An apparatus, comprising:
an elevated platform and a ladder or stair set configured for accessing the platform from the ground;
an extension having a leading edge slidably extendable horizontally from the elevated platform toward a side surface of an aircraft;
a probe extending horizontally from the leading edge of the extension and being slidably coupled to the extension; and
an indicator connected to the probe and configured to rotate from a first orientation to a second orientation in response to engagement between the probe and the side surface as the extension approaches the side surface;
wherein the indicator is configured to complete rotation from the first orientation to the second orientation when the leading edge of the extension is located at a predetermined distance from the side surface of the aircraft; and wherein the indicator in the second orientation is configured to form a vertical wall extending upward from the leading edge of the extension.
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