3-
18 ST50 PLUS RADAR Operation and Installation Handbook
@ CURSOR CONTROLS
The Cursor feature combines the EBL and VRM functions and can
be used to quickly determine the range and bearings from your
own ship to any point on the radar screen. The cursor appears on
the display as a large (+I character.
To turn ON the Cursor mode, just press the
-1
key. A
blocked word “CURSOR” appears at the bottom left side to let you
know that you are in the “Cursor” mode. The cursor (+I may now
be positioned by using the arrow keys. The cursor can be moved
diagonally by pressing the
w]
keys simultaneously, or the
Ir/)keys
It
sim
u
aneously. When the cursor is set to a position
on the screen, the range and bearing, will be displayed in the
cursor window.
The bearing type of the cursor position will be the same as that
of the EBL as noted by the blank for Relative,
‘7”
True or “M”
Magnetic next to the cursor bearing.
To turn off the cursor, press the (CURSOR/ key again. The cursor
information will be replaced by position information.
@ CTR/ZOOM KEY
The Off Center Mode lets you re-position the radar picture center
at any other point on the display so you can have a greater view
in the direction of interest.
When
the-/key
is pressed, the position of own ship can
be set anywhere on the screen up to 66% of the radius.
Press theICTR/ZOOMIkey. Both the cursor and the message “Use
A./V/~/,
to set sweep origin or press CTR/ZOOM for zoom”
appears in the lower center portion of the display. Use direction
keys to set cursor for sweep origin (start point) then press
-[key
again to offset the picture. The Off Center Origin
is set using the arrow keys. To use the Off- Center feature set the
cursor with arrow keys to the desired location for the Off Center
sweep origin. Press the lCTR/ZOOM) key to activate the offset
mode and place own ship to the designed cursor location. The
origin of the radar sweep will now shift to the cursor point. To turn
off Off Center and recenter the sweep, press
the1
CTK/LUUM
IKey
again.
Section 3. Operation
The Off Center Mode does not operate on the 16 nm range and
cannot be used together with the ZOOM mode.
Since off centering cannot be used on the maximum range scale,
if the range scale is increased to 16 NM, the origin of own ship will
automatically “cancel” the OFF Center mode and recenter own
ship. If the radar system is turned OFF while off center mode is on,
at next power up the offset mode will still be on.
No
Offset
(.rljt
a
‘,
The Zoom mode can be used to magnify any designated area of
the display by “two times”. When thelCTR/ZOOM]key is pressed
twice quickly, “X2” will be displayed on the top left of the screen.
The area between own
‘ship
and the designated location can be
magnified by a factor of 2 times by using the cursor as the
centering point. The zoom location can be set any where on the
screen up to 66% of the radius by using
the arrow keys. Once you have set the cursor, press the
[CTR/ZOOMkey to turn “ON” Zoom mode. To assist you in
maintaining proper range determination, the fixed range rings are
also turned “on” automatically.
Zoom mode can provide a quick means of getting a closer look
at a channel entrance, for example, but for navigation purposes
it is recommended that you choose the next lower range scale and
use
the Off Center feature for the same effect. By pressing the
--__.
~~
ICTR/ZOOM) key again, the function can be turneb “off”.
zoom
does not operate on the
l/8
nm range and cannot be used
together with “OFF CENTER”.
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