unpiloted

English

Etymology

un- +‎ piloted

Adjective

unpiloted (not comparable)

  1. Lacking a pilot
    The ship was unpiloted and adrift.
    • 1959 October, Cecil J. Allen, “Locomotive Running Past and Present”, in Trains Illustrated, page 479:
      The trouble has been mainly due to the preceding 6.40 p.m. Sheffield express, which since being demoted from an "XL Limit" to a "Special Limit" schedule had presented unpiloted Class "6" 4-6-0s with loads at times up to 12 bogies. [In railway parlance "unpiloted" means the train had no pilot engine double-heading it.]
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