| bearing | Bearing between geographical locations |
| bearingTrack | Bearing between geographical locations |
| dist.next | Internal function for package argosfilter |
| dist.prev | Internal function for package argosfilter |
| distance | Great circle distance between geographical coordinates |
| distanceTrack | Great circle distance between geographical coordinates |
| distance_m | Internal function for package argosfilter |
| internal.angles | Internal function for package argosfilter |
| radian | Degrees to radians |
| sdafilter | Filter Argos locations |
| seal | Satellite tracking data from a ringed seal |
| vmask | Filter locations for speed |