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Anleitung Zusammenfassung
Its accuracy can be affected by many factors, including equipment failure or defects, environmental conditions and incorrect handling or use. It is the user’s responsibility to exercise common prudence and navigational judgement. This device should not be relied upon as a substitute for such prudence and judgement. CAUTION: Do not connect/disconnect the GPS Antenna from the display unit whilst power is applied. Such action could cause irreparable damage. WAAS Satellite Differential GPS WAAS provides differential augmentation to GPS. It was designed to enhance the basic GPS service to satisfy the aviation industry’s navigation requirement for instrument flight rule navigation and landing, IFR and approach landings. WAAS has been in near continuous broadcast since December 1999 and is also available for other GPS applications such as marine navigation, surveying, agriculture and automotive systems. WAAS consists of a network of ground reference stations across the United States that monitor GPS satellite data. The master stations collect data from the reference stations and create a GPS correction message, taking into account selective availability (SA), GPS satellite orbit and clock drift, and signal delays caused by the atmosphere and ionosphere. The ‘corrected’ differential messages are then broadcast through two Geostationary Earth Orbit (GEO) satellites on the same frequency as the GPS signal. The Raymarine Raynav 300 and 301GPS receiver utilizes one of its 12 channels to ‘listen’ and decode the corrected WAAS messages. The result is a DGPS system that provides improved accuracy (<3 meters) in comparison with standard GPS (100 meters with SA, 15 m without SA) and land based DGPS (10 meters) systems. The WAAS system is shown diagrammatically in Figure i. Raynav 300 GPS Plotter .. Figure i: The WAAS System Availability of the WAAS System in North America The WAAS system is presently broadcasting and being tested for aviation use. It is expected to be certified by the FAA in 2002. During this testing and certification period, continuous service is expected; however, brief signal outages may occur as refinements and upgrades are made to the system. The status of WAAS and planned outages are available on-line at the following websites: or Your unit is shipped from the factory in normal GPS mode. For improved accuracy provided by the WAAS system, you need to enable the WAAS capability of your unit. . To enable WAAS: 1. Press the MENU key 2. Press GPS SETUP soft key 3. Press FIX MODE soft key to select SD mode. Extended Offshore Coverage Using two GEO satellites, WAAS provides augmented differential GPS coverage for most of North America. Since the WAAS differential messages are broadcast by GEO satellites, the WAAS signals cover a greater area both inland and offshore in comparison with land based DGPS systems. Coverage for North America is shown in Figure ii. Prelim Pages 135°E 150°E 165°E 180° 165°W 150°W 135°W 120°W 105°W 90°W 75°W 60°W 45°W 30°W 15°W 0° 15°E Figure ii: WAAS Coverage Map D4910-10° 15°N 30°N 45°N 60°N 75°N 15°S Coverage Outside of North America Europe and Asia are developing similar systems to WAAS called EGNOS and MSAS respectively. Combined with WAAS, these systems will provide global satellite based differential GPS augmentation into the future. EGNOS is currently in the early testing and qualification phases and signal outages may occur at any time. The status of EGNOS and any planned outages are available on-line at Raymarine’s website: Your unit is shipped from the factory in normal GPS mode. For improved accuracy provided by the EGNOS system, you need to enable the EGNOS capability of your unit. . To enable EGNOS: 1. Press the MENU key 2. Press GPS SETUP soft key 3. Press FIX MODE soft key to select SD mode. Accuracy and Continuation of Broadcast Coverage The navigational accuracy of equipment using these satellite broadcast SD signals during the testing and qualification phases is not guaranteed by Raymarine Limited or Raytheon Corporation, nor is the continuation of the broadcast SD signals the responsibility of Raymarine Limited or Raytheon Corporation. Raynav 300 GPS Plotter Preface This handbook covers the Raynav 300 GPS Plotter manufactured by Raymarine. It contains important information on the installation and operation of your new equipment. In order to obtain the best results in operation and performance, please read this handbook thoroughly. Raymarine’s Product Support representatives or your authorized dealer are available to answer any questions you may have. Warranty To register your Raynav 300 GPS Plotter ownership, please take a few minutes to fill out the warranty registration card found at the end of this handbook. It is important that you complete the owner information and return the card to the factory in order to receive full warranty benefits. EMC Conformance All Raymarine equipme...