Furuno CH-300 Operator's Manual page 97

5. MENU OPERATION
HEADING INDICATION: Chooses heading indication format, true (default setting) or
azimuth, for the echo sounder and vertical scan modes. The default setting is TRUE.
Requires heading data.
NORTH MARK: Turns the north marker on or off (default setting). Requires heading data.
CSE DATA: Chooses heading data source, navigator or gyrocompass, to draw ship's track.
The default setting is navigator. For heading sensor or gyrocompass connection, choose
gyrocompass.
NAV DATA: Chooses source of position data, GPS, Loran C, Loran A, DR (Dead
Reckoning), Decca or Others (for equipment not shown, receives talker only). Default
setting is GPS.
NAV2 BAUDRATE: Sets the baud rate of the NMEA port on transceiver unit. Default setting
is 4800 bps. For connection with satellite compass, choose 38400 bps.
TVG CORRECTION: This feature raises long-range sensitivity without disturbing short-
range sensitivity, and it is particularly effective on high frequency. For dual frequency use,
particularly when you feel that sensitivity on the high frequency is low compared to that on
the low frequency, adjust TVG correction for the high frequency. The settings available are
OFF, 1/2 and 1/1, in ascending order of strength. If the setting is too strong, noise will result.
Watch the display while changing this setting.
If noise exists on short range or if the echo strength of like size fish from long and short
ranges is different use the TVG feature. For further details, see 2.12.3, 3.12.1 and 4.10.1.
UNIT: Chooses unit of depth measurement: meters (default setting), feet, fathoms,
passi/braza, Hiro.
TEMP: Chooses unit of water temperature measurement: °C (default setting), °F.
TARGET L/L: Turn on to output event marker position to external equipment. Requires
heading and latitude and longitude data from external equipment. Default setting is OFF.
CUSTOM KEY: Chooses function of custom mode keys: preset (default setting) or short-cut.
For details see paragraph 5.2.
ETA MARK: A vector line extends from the own ship marker in direction of ship's bow on
the horizontal mode display. The tip of the line shows the estimated time of arrival after the
selected ETA time elapses, using the current ship's speed. ETA is calculated every second
considering tilt and detection range. This function requires speed input.
ETA mark
ETA marker
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