GPS DATUM

[Bduck]

On your GPS unit what GPS Datum frame is set? My Raymarine Element comes equipped with a menu of worldwide frames that can be installed depending location but the WGS 1984 (World Geodetic System 1984 (WGS 84)) is its default setting. My Raymarine Dragonfly does not come with this menu but uses the WGS 1984 frame which is a default setting for this unit. I'm assuming most units are set the WGS 1984 frame as default unless it can be changed with a menu provided in the unit like my Element. My question is do you use a different frame other than a default setting? Why?

North American Vertical Datum of 1988 (NAVD 88) - Vertical Datum - Datums - National Geodetic Survey (noaa.gov)