Clock orientation

It takes practise but clock directions are a good and relatively quick way of describing the relative direction of an object using the analogy of a 12-hour clock. Just imagine the clock-face around you with 12 o'clock to your front, 3 o'clock to your right, and so on.

Left and right orientation

I find that people sometimes like to say "to your right" or "to your left" and there often being confusion about how much someone should rotate in these directions.

Allow me to set a standard by making left and right 90° angles and adding finer rotation with "by left" and "by right" to mean 30° rotations, equivalent to an hour's rotation on the clock face.

You could describe 5 o'clock as "behind by left". Though it may be simpler to only use "by left" and "by right" as adjustments to a "left" or "right" call, or as a refinement to the clock method.