One huge benefit of this effort is super-accurate trip-time and time-to-waypoint estimates. iNavX does all the math for me—I get distance-to-waypoint, time-to-waypoint, and ETA-at-waypoint numbers, and the same for the destination. I can guess time of arrival to within half a day at the outset of our passage, assuming that the wind follows the forecast. By Mile 250 of a 500-mile passage, I can usually estimate our ETA to within three hours. This is awesome information to have under any circumstances, but it’s beyond awesome when you need to time your arrival at a pass, port, or other rendezvous.