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Control Function
NORM, E/S, HIST
(Mode keys)
Select display mode: NORM, normal sonar picture; E/S, Echosounder
combination; HIST, Historical display.
Lamp above a key lights to show current selection.
RECALL, MEMO RECALL: Replays saved picture.
MEMO: Saves picture to memory card or internal memory.
RANGE Selects a picture display range. Range selected appears on the display.
GAIN Adjusts receiver sensitivity.
NARROW Sharpens width of Tx beam when turned on (light above key is on).
The off position provides normal Tx beamwidth.
BOOST Changes weight of vertical direction during transmission when turned
on.
SHOOT Press when net is cast. The net shooting mark, *net sonde marks and
*current mark appears at the own ship mark. The net shooting mark,
net sonde marks and current mark moves on the *ship's track as the
ship moves. The lamp above the switch lights and time *distance run
appear on the display unitl the net shooting mark is turned off.
(* Requires external sensor.)
R/B Provides range and bearing data from own ship to a target. Select
target with trackball and then press the R/B key. A line connects
between own ship mark and trackball mark to measure bearing.
TILT Changes the tilt angle of the sounding beam between -5°and 60°.
AUTO TILT Automatically tilts the sounding beam up and down in 2° steps within
the tilt angle selected by the WIDTH key. The lamp above the key
lights when automatic tilt is on.
WIDTH Sets tilt width in automatic tilt.
NET COURSE Marks location of net.
TARGET LOCK Tracks a fish school.
EVENT 1, 2 Inscribes event mark on the display, to find horizontal, range, depth
and bearing of a target.
ESTIMATE 1, 2 Compares volume of two fish schools.
FISH Measures fish school speed.
OFF-CENT Relocates selected target.
DIM Adjusts the backlighting of the control panels and the brightness of
the lamps above keys
CONT Adjusts screen contrast.
BRILL Adjusts screen brilliance.
AUDIO Adjusts volume of built-in loudspeaker, which monitors a target
appearing along the bearing marker.
TRACKBALL Follows on-screen movement of trackball mark, to enter marks and
off-center the screen.