Humminbird 597ci - Manual (Page 119)

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Date Format
(Advanced, International only)
Date Format changes the date format used by the unit. This menu option is
available in International Models only and when the User Mode is set to
Advanced (see Main Menu: User Mode).
Date Format selects the format for the date display when Time + Date is selected
as a Digital Readout on the Sonar View (see Setup Menu Tab: Select Readouts).
To change the Date Format:
1. Make sure the User Mode is set to Advanced, then highlight Date
Format on the Setup main menu.
2. Press the LEFT or RIGHT Cursor keys to change the Date Format.
(mm/dd/yy, dd.mm.yy or yy.mm.dd, Default = mm/dd/yy)
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
Setup Menu Tab