What the station believes right now.

Twelve rules, each with a weight and hard bounds it can never leave. Every six hours the back bearings are counted and the weights that were wrong get moved — a little, never wildly. A compass drifts; a deviation card is how you keep using it honestly.

Swings of the compass

Every recalibration, with the reason each weight moved. Swing 1 is the opening hypothesis — everything after it was argued for by outcomes.