Furuno TZT9 Operator's Manual page 150

Screen A: When SART is distant
Radar antenna beamwidth
Own ship position Own ship position
24 NM
How to detect the SART response
• Use the range scale of 6 or 12 NM. The distance between the SART responses is
approximately 0.6 NM (1125 m) to identify the SART.
• Turn off all the automatic clutter filters.
• Turn off the interference rejector.
Racon (Radar Beacon)
A racon is a radar transponder that sends a characteristic signal when the racon re-
ceives a radar pulse (normally only the three-centimeter band). If the racon signal is
sent on the same frequency as that of the radar, the signal appears on the radar dis-
play. The racon signal appears on the radar in one of two methods:
• A line that starts just after the position of the Racon
• A Morse code signal displayed with a line just after the position of the Racon
SART, Racon and the solid state radar
A SART or Racon at a distance of one or more nautical miles from own ship cannot
be correctly displayed by a solid state radar. With the conventional magnetron radar,
the signal from a SART or Racon is displayed on the radar screen with 12 points in the
distance direction. With the solid state radar, however, the points connect to one an-
other to form a single line, which cannot be recognized as the signal from a SART or
Racon.
Echo from SART
(Lines of 12 dots
are displayed in
concentric arcs.)
Position of
SART
Screen B: When SART is close
Own ship position Own ship position
1.5 NM
6. RADAR
Position of
SART
6-25