Furuno FR-8122 EU - Manual (Page 38)

1. OPERATIONAL OVERVIEW
1-27
1.22 Echo Stretch
The echo stretch feature enlarges targets in the range and bearing directions to make them easier
to see, and is available on any range. There are three levels of echo stretch as shown in the table
below.
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 those 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 press the ENTER key.
4. Choose the appropriate echo stretch option and press the ENTER key.
5. Press the MENU key to close the menu.
Echo stretch settings
ES
Setting
Range Bearing
1 Stretched to two dots An echo is stretched to three dots if its size is
less than three dots. If its size is larger than
three dots it is not stretched.
2 Stretched to three dots An echo is stretched to four dots if its size is
less than four dots. If its size is larger than four
dots it is not stretched.
3 Stretched to three dots An echo is stretched toy five dots if its size is
less than five dots. If its size is larger than five
dots it is not stretched.
Note
Off
1
2
3