Knowing exactly where we are at each time is a key component of safe navigation and the use of GPS and ECDIS provide this capability nowadays, but the continuing trend to rely solely on this means of navigation rather than to cross-check with other independent and reliable navigation techniques introduces a significant risk, CHIRP notes.
Several incidents reported by CHIRP related to the discrepancy due to settings of the GPS – specifically the smoothing.
In this regard, CHIRP provides a simple...
https://safety4sea.com/gps-smoothing-how-to-remove-discrepancies-in-received-positions/