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1.22 Off-Centering
Own ship position, or sweep origin, can be displaced to expand the view field without
switching to a larger range scale. The sweep origin can be off-centered to the cursor
position, but not more than 75% of the range in use; if the cursor is set beyond 75% of the
range scale, the sweep origin will be off-centered to the point of 75% of the limit.
This feature is not available on the longest range scale or in the true motion mode. The
number of range rings increases, keeping the original range intervals unchanged.
To off-center the radar picture:
1. Place the cursor at a position where you wish to move the sweep origin by operating
the trackball.
2. Press the [OFF CENTER] key. Then, the sweep origin is off-centered to the cursor
position.
3. To cancel off-centering, press the [OFF CENTER] key again.
1.23 Echo Stretch
On long ranges target echoes tend to shrink in the bearing direction, making them difficult
to see. On short and medium ranges such as 1.5, 3 and 6 SM scales, the same size
targets get smaller on screen as they approach own ship. These are due to the inherent
property of the radiation pattern of the antenna. To enhance target video, use the echo
stretch function. There are 3 settings: echo stretch 1 (ES1) to enlarge in bearing direction
for long range detection, echo stretch 2 (ES2) to enlarge in range direction and echo
stretch 3 (ES3) to enlarge in both bearing and range directions.
To activate the echo stretch:
1. Press the [RADAR MENU] key to show the FUNCTIONS 1 menu.
2. Press the [0] key to display the FUNCTIONS 2 menu.
[FUNCTIONS (2)]
1 [FUNCTIONS (1)]
2 BKGD COLOR BLK(GRN CHAR)/
BLK(RED CHAR)/
BLU (ECHO AREA)
BLU/
BRT BLU
3 ECHO STRETCH OFF/1/2/3
4 ECHO AVERAGE OFF/1/2/3
5 ECHO COLOR YEL/GRN/COLOR
6 SHIP SPEED LOG/NAV/MAN
MAN = 00.0KT
(STW/SOG)
7 SET, DRIFT OFF/MAN
SET = 000.0°
DRIFT = 00.0KT
8 INDEX LINES NO. 2 VRM/MAN
MAN = 00.00SM
9 [BRILLIANCE (1)]
0 [FUNCTIONS (3)]
Figure 1-26 FUNCTIONS 2 menu