pub const TACK_RAY_LENGTH_NM: f64 = 1.0;Expand description
How far a tack ray reaches from the vessel in tack_rays.
Unlike a layline, a tack ray has no mark to scale itself against –
there is no “distance to” anything – so this is a plain figure
instead: long enough to read clearly at typical coastal and harbour
display scales, short enough not to run off a zoomed-in view. pub
for the same reason as LAYLINE_LENGTH_FACTOR.