Humminbird Matrix 77c - Manual (Page 26)

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Depth Offset
(Advanced)
Depth Offset will adjust the digital depth readout to indicate depth from the waterline
or boat's keel. Enter a positive vertical measurement from the transducer to the
waterline to read the depth from the waterline. Enter a negative vertical measurement
from the transducer to keel to read the depth from the keel. This menu choice is
available only when in Advanced User Mode (see Setup Menu Tab: User Mode.)
To change the Depth Offset setting:
1. Make sure you are in Advanced User Mode, then highlight Depth Offset on
the Setup menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Depth Offset
setting. (-10.0 to +10.0 feet or -3 to 3 meters [International Models Only],
Default = 0)
Temp Offset
(Advanced)
Temp Offset will adjust the temperature readout by the amount entered. This menu
choice is available only when in Advanced User Mode (see Setup Menu Tab: User Mode.)
To change the Temp Offset setting:
1. Make sure you are in Advanced User Mode, then highlight Temp Offset on
the Setup menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Temp Offset
setting. (-10.0 to +10.0 degrees, Default = 0)
Speed Calibration
(Advanced, with Temp/Speed Only)
Speed Calibration will adjust the speed readout by the percentage entered, and will appear
in the menu if a Temp/Speed Accessory is connected and the paddlewheel has moved at
least once, when the unit is in Advanced User Mode (see Setup Menu Tab: User Mode.)
To change the Speed Calibration setting:
1. Make sure you are in Advanced User Mode, then highlight Speed Calibration
on the Setup menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the Speed
Calibration setting. (-20% to +20%, Default = 0%)
NMEA Output
(Advanced)
NMEA Output turns the NMEA output on or off. This menu choice is available only
when in Advanced User Mode (see Setup Menu Tab: User Mode.)
The following NMEA sentences are output:
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
When navigating, the following NMEA sentences are also output:
APB - Autopilot Sentence B
BWR - Bearing and Distance to Waypoint
RMB - Recommended Minimum Navigation Info
To turn NMEA Output on or off:
1. Make sure you are in Advanced User Mode, then highlight NMEA Output on
the Setup menu.
2. Use the LEFT or RIGHT 4-WAY Cursor Control keys to change the NMEA
Output to On or Off (On, Off, Default = Off).
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