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2. DESCRIPTION OF RADAR
2-6
2.3.2 General remarks on receiving SART
SART range errors
When the SART is at a range greater than approximately 1 nm, the first dot is dis-
played at 0.64 nm past the true position of the SART. When the range closes so that
the fast-sweep responses are also seen, the first range echoes are displayed at 150
m past the true position.
Range scale
When you find the SART position, do as follows:
1. Use the RANGE key to set the range scale to 6 nm or 12 nm.
2. Turn off [A/C Auto].
3. Turn off [Int Rejector].
SART display
To display only the SART echo clearly on the radar screen, reduce the tuning on man-
ual mode. The normal radar echoes get weak, but the SART echoes remain. Your ship
comes near the SART, the arc for the SART display becomes larger. Most of the radar
screen becomes fuzzy. Adjust the A/C SEA and GAIN controls to display the neces-
sary screen.
2.4 RACON
The RACON is a RAdar beaCON which sends radar-receivable signals in the radar
frequency spectrum (X- or S-band). There are several signal formats; in general, the
RACON signal appears on the radar screen as an echo in the shape of a rectangle
originating at a point just past the position of the radar beacon. It has a Morse coded
pattern. Note that the position on the radar display is not accurate.
Echoes on the radar screen Echo desription
Your ship position
Your ship position
RACON signal
RACON signal
RACON station
RACON station