Passage Monitoring is a global free-of-charge service that monitors the progress of recreational vessels conducting ocean passages.
I use a range of tools, including satellite AIS, trackers, and email / HF radio reporting, to keep a constant watch on yachts that have filed a float plan prior to departure.
Whilst available to all yachts, Passage Monitoring is especially suited to short handed and solo sailors, in particular circumnavigators.
Garmin InReach, Iridium Go!, Iridium Go! Exec + PredictWind Datahub, YB3, or Zoleo