WordReference Random House Unabridged Dictionary of American English © 2020
west by north, [Navig., Survey.]
  1. Surveyinga point on the compass 11°15prime;
    north of west. Abbr.: WbN

Collins Concise English Dictionary © HarperCollins Publishers::
west by north n
  1. one point on the compass north of west, 281° 15′ clockwise from north
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