+- Raymarine forum (http://forum.raymarine.com)
+-- Forum: Raymarine Forums (/forumdisplay.php?fid=1)
+--- Forum: Multifunction Displays (/forumdisplay.php?fid=120)
+--- Thread: Boat speed off (/showthread.php?tid=3566)
Boat speed off - Brad K - 07-17-17 07:58 AM
I have a C97 MFD purchased two years ago. I am on a trip and find Boat speed is out by about a knot. Compared to my datamarine knot log and a Garmin hand held GPS and Navionics on my Iphone 5.
I will be doing 6.0 knots and the MFD says 7.0 knts +- 0.2. After 30 minutes it might agree and be the same.
I am in northern Lake Huron Ontario Canada.
I am using Datum WGS1984
The MFD is using the original software. no upgrades yet.
serial# C97 E700120520293
Using navionics chart that came with unit.
I checked the distance log with the latitude travelled and it is ok.
RE: Boat speed off - Chuck - Raymarine - Moderator - 07-18-17 12:35 PM
Welcome to the Raymarine Forum Brad,
Please click here to view a FAQ addressing this subject.