Two ways to find a hidden point

Multi-caches and puzzle caches often describe the final as a crossing point. Sometimes you take a bearing from two landmarks and the cache is where the two lines meet. Other times you are told the final is a certain distance from one point and another distance from a second point, which means it sits where two circles cross.

Put the two starting coordinates on separate lines, choose the method, and enter the bearings or distances. Two circles usually meet in two places, so CacheCrack shows both. If two bearing lines would only meet behind a starting point, it tells you so, since that usually means a bearing was measured the wrong way round.

Accuracy

The math runs on the WGS84 ellipsoid, the same model GPS receivers use, so results match what your device shows to well under a meter.