Furuno USA 9ZWRTR095 Marine Radar User Manual

Furuno USA Inc Marine Radar

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Manual 3

4-1Chapter 4: ARPA OperationThis Automatic Radar Plotting Aid (ARPA) tracks the movement of up to 30 radar tar-gets. Targets can be acquired manually or automatically. All 30 targets can be ac-quired manually when the ARPA acquisition area is inactive. With the acquisition area that total is equally divided between manual and auto acquisition.ARPA requires speed and heading data. The symbols used in this radar comply with IEC 60872-1. WARNINGNo one navigational aid should be relied upon for the safety of vessel and crew.The navigator has the responsibility tocheck all aids available to confirmposition. Electronic aids are nota substitute for basic navigationalprinciples and common sense.• This auto plotter automatically tracks an automatically or manually acquired radar target and calculates its course and speed, indicating them by a vector. Since the data generated by the auto plotter are based on what radar targets are selected, the radar must always be optimally tuned for use with the auto plotter, to ensure required targets will not be lost or unwanted targets such as sea returns and noise will not be acquired and tracked.• A target does not always mean a land- mass, reef, ships or other surface vessels but can imply returns from sea surface and clutter. As the level of clutter changes with environment, the operator should properly adjust the A/C SEA, A/C RAIN and GAIN controls to be sure target echoes are not eliminated from the radar screen. CAUTIONThe plotting accuracy and response ofthis auto plotter meets IMO standards.Tracking accuracy is affected by thefollowing:• Tracking accuracy is affected by course change. One to two minutes is required to restore vectors to full accuracy after an abrupt course change. (The actual amount depends on gyrocompass specifications.)• The amount of tracking delay is inversely proportional to the relative speed of the target. Delay is on the order of 15–30 seconds for high relative speed; 30–60 seconds for low relative speed.Display accuracy is affected by thefollowing:• Echo intensity• Radar transmission pulsewidth• Radar bearing error• Gyrocompass error• Course change (own ship or target)
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Document ID928761
Application IDej00VC8/HvOAHcW1wjx1bw==
Document DescriptionManual 3
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeUser Manual
Display FormatAdobe Acrobat PDF - pdf
Filesize191.42kB (2392803 bits)
Date Submitted2008-04-16 00:00:00
Date Available2008-04-16 00:00:00
Creation Date2007-07-20 12:06:59
Producing SoftwareAcrobat Distiller 7.0.5 (Windows)
Document Lastmod2007-07-20 12:07:23
Document Titleuntitled
FCC ID Filing: ADB9ZWRTR095

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