Presentation on theme: "TUTORIALS RR 0.25 NM RANGE 1 NMANTISEA 000 030 060 120 150 180 210 240 300 330 LEFT CLICK TO BROWSE OR USE SHORTCUT BUTTONS TEXT NET LINKS RADAR EYE RADIO."— Presentation transcript:
A small pulse transmitter is mounted on the beacon which is triggered by the vessels radar pulse. The mark will be displayed on the screen only intermittently. The true echo of the beacon will appear on the screen in front of the identification signal.
Ramarks transmit pulses continuously or to special time schedules, rather than on receipt of a vessel’s radar pulse.
SARTS detect the incoming radar pulse from a searching aircraft or ship and respond by transmitting a distinctive signal of 12 blips extending approximately 8 nautical miles outward from the SART’s position.
SHIPS HEAD UP NORTH UP RELATIVE MOTION TRUE MOTION UNSTABILISED DISPLAY STABILISED DISPLAY
TRUE MOTION TM EBL 300 EBL 315 EBL 330 270T TO 300T TRUE MOTION RELATIVE MOTION SHU DISPLAY UNSTABILISED 270T 285T 300T TARGET DISPLAY ON CHANGING OWN COURSE THE HEADING MARKER REMAINS STILL. THE TARGET BLURS AS OWN SHIP TURNS & THEN SETTLES ON THE WIDER RELATIVE ANGLE (EBL)
HM 270T - 300T TM NU EBL 240 HM NU EBL 240 HM EBL 240 TRUE MOTION RELATIVE MOTION NU DISPLAY STABILISED TARGET DISPLAY ON CHANGING OWN COURSE HM MOVES TO FOLLOW COURSE CHANGE & TARGET TRACE IS STATIC
COLLISION AVOIDANCE THE SS STOCKHOLM (BELOW) COLLIDED WITH THE SS ANDREA DORIA WITH THE LOSS OF 52 CREWMEN DESPITE A RADAR WATCH. IT WAS TO BE LATER CALLED THE FIRST: RADAR ASSISTED COLLISION READ HER STORY
CHECK TARGETS CLOSING ON THE EBL BACK 000 030 060 090 120 150 180 210 240 270 300 330 DECREASING RANGE ON THE SAME EBL WARNS OF COLLISION
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