Humminbird 700 SERIES 798CI - Manual (Page 179)

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Digits Format
(Advanced)
Digits Format allows you to add a tenth decimal place to readouts such as
Temperature and Depth. The format can be changed to small format, large
format, or no format. This menu option is available when the User Mode is set
to Advanced (see Main Menu: User Mode).
To change the Digits Format setting:
1. Make sure the User Mode is set to Advanced, then highlight Digits
Format on the Setup main menu.
2. Press the LEFT or RIGHT Cursor keys to change the Digits Format
setting. (Small tenths, Large tenths, No tenths, Default = Small tenths)
NMEA Output
(Advanced)
NMEA Output turns the NMEA* output on or off. This menu option is available
when the User Mode is set to Advanced (see Main Menu: User Mode).
NMEA Output should be turned On if you connect the NMEA Output wires of
the GPS Receiver cable to another NMEA-compatible device, such as an
autopilot.
*NMEA 0183 is a National Marine Electronics Association standard for data
communication.
The following NMEA sentences are output when NMEA Output is turned On:
DPT- Depth
MTW - Water Temperature
GLL - Lat/Lon Position
GGA - GPS Fix Data
RMC - Recommended Minimum Specific GNSS Data
VTG - Course Over Ground and Ground Speed
ZDA - Time and Date
Set Up Menu Tab