Filter
Top Products
3. VERTICAL MODE
3-9
When a fish school is located on a long-range setting (about 800 meters) and
is approaching own ship do as follows:
Adjust the tilt to keep the fish school in the center of the sonar beam, namely,
fish school is displayed in strongest colors possible. Confirm that the fish
echo is displayed in the same color as it approaches. If the color suddenly
changes to weaker colors as the fish enters MEDIUM and NEAR areas, the
TVG is improperly set. Adjust the TVG. If this again produces sea surface
reflections and noise try to remove them with AGC and NL controls.
Note: If the above procedure does not produce satisfactory results, the TVG
curve can be changed on the V-SCAN SETTING menu. Also refer to section
3.8.4 “Adjust Near AGC”.