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2. RADAR OPERATION
2-19
2.18.5 Echo trail mode
Echo trails can be shown in Relative or True motion. (True trails require heading and speed
inputs.)
1. Press the MENU key.
2. Press the RADAR DISPLAY SETUP key.
3. Choose A: TRAIL MODE, then press the A: EDIT soft key.
TRAIL MODE
TRUE
RELATIVE
Trail mode window
4. Select TRUE or RELATIVE as appropriate, then press the C: ENTER soft key.
5. Press the MENU key to close the menu.
2.19 Echo Stretch
Normally, the reflected echoes from long range targets appear on the display as weaker
and smaller blips even though they are compensated by the radar’s internal circuitry. The
echo stretch function magnifies these small blips in all ranges. Two types of echo stretch
are available: ES LOW which stretches echoes in bearing direction and ES HIGH which
stretches them in both range and bearing directions.
"LOW" Echo stretch "HIGH" Echo stretch
Bearing
direction
Bearing
direction
Range
direction
Echo Stretch OFF
Target
Types of echo stretch
This function magnifies not only targets but also sea clutter and radar interference. For this
reason, be sure sea clutter and radar interference are properly suppressed before activating
the echo stretch.
1. If not displayed, press the HIDE/SHOW key to show the radar soft keys.
2. Press the A: SIGNAL PROC. soft key.
3. Press the B: E. STR soft key to select HIGH, LOW or OFF as appropriate.
4. Press the E: RETURN soft key to finish.
The display shows ES H (High) or ES L (Low) when the echo stretch is on.
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