What direction is NNW plus 90 degrees?

Answer 1

The direction NNW plus 90 degrees is ENE.

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NW is a bearing of 315 and NNW is a bearing of 337.5.

Add 90 to this, and subtract 360 because we have "gone round":

337.5 + 90 = 427.5;

427.5 - 360 = 67.5.

This is past NE, so the answer is ENE.