Icom MarineComander MXS-5000 Instruction Manual

Icom MarineComander MXS-5000 Instruction Manual Manual pdf 111 page image

3-393RADAR OPERATION123456789101112131415161718192021D Multiple echoesMultiple echoes may appear when a short-range andstrong echo is received from a ship, bridge, or break-water.Multiple echoes will appear beyond the target’s trueecho point on the same bearing of a large target.They can be reduced with proper adjustment of theSEA level.See p. 3-5 for the SEA level adjustment.D Minimum rangeDetection at short range is very important. Minimumrange is determined primarily by transmitter pulselength, vertical beam width and height of the scannerunit. The shorter the transmission time, the quickerthe return echoes can be received and their distancemeasured.The ability to see targets very close to the ship is de-creased if the scanner is mounted too high off thewater, because the bottom of the vertical beam of thescanner cuts off nearby targets.This target can not be recognized with radar.The target in this area can not be recognized.Pulse lengthPulse starting pointVertical beam widthOwn ship Another ship True echoFalse echoes