Direction

The direction of a pattern is defined by the way the pattern, or a part of it, reappears in a different area.

For spaceships, puffers, rakes and certain breeders, this is defined as orthogonal (exclusively horizontal or vertical displacement), diagonal (both horizontal and vertical displacement, and oblique (other displacements, for example knightwise being horizontal being twice vertical displacement).

Also see
gollark: But they do transmit the offset.
gollark: They use TAI, which doesn't have leap seconds at all.
gollark: No trigonometry somehow, just vector maths.
gollark: The speed of light is such that if they were off by a fraction of a second the distances would probably be unusably wrong.
gollark: Then you use the known position of the satellites and distances to each to work out where you are.
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