Humminbird 77c manual Depth Offset, Temp Offset, Speed Calibration, Nmea Output

M77_Man_Eng_531350-1_B.qxd 1/3/2005 4:30 PM Page 50

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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