1. OPERATIONAL OVERVIEW
1-24
1.21.2
Zoom mode
You may choose the zoom mode from among Relative, True or Target.
1. Press the
MENU
key to open the menu.
2. Choose the Mark menu and press the
ENTER
key.
3. Choose Zoom and then press the
ENTER
key.
4. Choose the appropriate echo stretch option and then press the
ENTER
key.
5. Press the
MENU
key to close the menu.
1.22
Echo Stretch
The echo stretch feature enlarges targets to make them easier to see, and it is available on the
1.5 -12 nm ranges depending on echo stretch type. There are 3 settings: ES1 to enlarge in bearing
direction for long range detection, ES2 to enlarge in range direction and ES3 to enlarge in bearing
and range directions.
Echo stretch
Note 1:
If the 1.5 nm is preset with a pulse length of S1 or S2, and the 3 nm scale with S2, the
echo stretch is not available on those range scales.
Note 2:
The echo stretch magnifies not only small target pips but also returns (clutter) from sea
surface, rain and radar interference. For this reason, make sure these types of interference have
been sufficiently suppressed before activating the echo stretch.
1. Press the
MENU
key to open the menu
2. Choose the Echo menu and press the
ENTER
key.
3. Choose Echo Stretch and then press the
ENTER
key.
4. Choose the appropriate echo stretch option and then press the
ENTER
key.
5. Press the
MENU
key to close the menu.
Relative
True
Target
Echo Stretch 1 Echo Stretch 2 Echo Stretch 3
Bearing
direction
Range
direction
Echo Stretch OFF
Target
Bearing
direction
Range
direction
Use on range
1.5 - 12 nm
Use on range
1.5 - 6 nm
Off
1
2
3
