Raymarine L750, Руководство по эксплуатации

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L750 Fishfinder: Installation and Operation Handbook
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If the fish symbols are turned on -
Any fish echoes appear as easy-to-read fish symbols, along with the
distances from the boat. When the fish symbol feature is used with the
Sidelooker page, the unit can carefully discriminate between fish and
unwanted echoes. This allows the Fishfinder to accurately locate and
identify only fish.
The Sidelooker sounding beam is transmitted very close to the surface
of the water. In rough or choppy water this turbulence may appear on the
Sidelooker display as “noise” or “clutter.” The Sidelooker will also display
noise or clutter when your boat travels at high speeds. For best results,
use the Sidelooker at idle or slow trolling speeds.
Here are the special items on this display:
Boat symbol
This shows that the bow of the boat is aiming forward, toward the
top of the display.
Centerline
The centerline of the boat is lined up with the centerline of the
display. (If the boat is turning, this only applies to the top of the
display. The centerline does not curve to match your course.)
Side range
This is the maximum distance the unit will be able to see using the
current range setting. Remember that the sound waves move out
at a shallow angle, so this distance is measured
sideways. See
Fig. 3-21. The units used here are chosen using the entry for
Depth Units in the System Setup display. If you have selected feet
(FT) or fathoms (FA), the distance shown here will be measured in
feet. If you have selected meters (M), the distance shown here will
be in meters.
Depth
This is the depth directly below the boat. Even when the Sidelooker
feature is turned on, the downward-looking transducer is still used
to measure the depth.