SECTION 15: FAULT DETECTION

AND EXCLUSION

NOTE: This section is intended for pilots expe- rienced with the operation of the GNS 530 and are familiar with RAIM. For more information regarding RAIM, see sections 10.3 and 10.4 of this manual.

FDE is an acronym that stands for Fault Detection and Exclusion. FDE was incorporated in the Garmin GNS 530 Main and GPS Software version 3.00 and higher. FDE algorithms, provide a basis for approval per the requirements for ‘GPS as a Primary Means of Navigation for Oceanic/Remote Operations’ per FAA Notice N8110.60. The oceanic flight phase is used by the GNS 530 when the aircraft is more than 200 nm from the nearest airport. FDE requires no pilot interaction during flight, but predicting the capability of the GPS constellation to provide service during a flight is done by the pilot prior to departure.

15.1 DETECTION AND EXCLUSION

FDE consists of two distinct parts, fault detection and fault exclusion. The detection function refers to the capability to detect a satellite failure which can affect navigation. Upon detection, the exclusion function excludes one or more failed satellites and prevent them from being used during navigation. This allows the GPS to return to normal performance without interruption. The process is entirely automated and does not require pilot interaction during flight. On the Satellite Status Page, the pilot can view information related to FDE operation. To enhance safety, FDE functionality is provided for other phases of flight (non-precision approach, terminal, enroute). The FDE functionality for non-oceanic flight phases adheres to the same missed alert probability, false alert probability, and failed exclusion probability specified by N8110.60.

SECTION 15 – FAULT DETECTION

AND EXCLUSION

Figure 15-1 shows satellite number 9 exclusion during oceanic phase of flight. No message notifying the user of exclusion appears. In addition to the EPE and DOP fields, there is the Horizontal Uncertainty Level (HUL) field which displays a 99% confidence level that the aircraft position is within a circle with a radius of the value displayed in the HUL field.

Excluded Satellite

Horizontal Uncertainty

(Checkered Pattern)

Level

Oceanic

Mode

Figure 15-1 Satellite Status Page

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GNS 530(A) Pilot’s Guide and Reference

15-1

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3D Connexion GNS 530(A) manual Detection and Exclusion, Fault Detection Exclusion
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GNS 530(A) specifications

The 3D Connexion GNS 530(A) is a sophisticated avionics solution designed specifically for general aviation and business aviation environments. It serves as an influential tool for pilots, offering enhanced navigation and communication capabilities. This device is particularly popular among those operating in complex airspaces and those who require efficient flight planning and execution.

One of the standout features of the GNS 530(A) is its integrated GPS navigation system. This system provides accurate positioning and navigation data, utilizing high-sensitivity GPS technology that improves situational awareness and safety. The device displays a comprehensive moving map, enabling pilots to visualize their flight routes, airspace boundaries, and nearby airports easily. Furthermore, it utilizes WAAS (Wide Area Augmentation System) capabilities, enhancing the accuracy of GPS signals and allowing for precision approaches.

In addition to GPS functions, the GNS 530(A) integrates VHF communication capabilities. This function allows pilots to communicate effectively with air traffic control and other aircraft, ensuring smooth operations in busy airspace. The intuitive interface includes a large, high-resolution display that presents essential flight information, making it easy for pilots to monitor vital data at a glance.

Another significant characteristic of the GNS 530(A) is its ability to interface with other avionics and flight management systems. This connectivity streamlines the flow of information between systems, allowing pilots to access a broader range of functionalities and enhancing overall flight management. With features like flight plan creation and editing, pilots can easily adapt to changes in their route.

The device also incorporates advanced safety features, such as terrain awareness and warning systems (TAWS) and traffic information systems (TIS). These technologies provide real-time alerts, helping pilots avoid potential hazards and maintain safe distances from other aircraft.

The GNS 530(A) is renowned for its durability and reliability, meeting rigorous aviation standards. Its user-friendly design ensures that pilots with various skill levels can efficiently use its features, making it an invaluable tool for enhancing airborne operations. Overall, the 3D Connexion GNS 530(A) significantly contributes to the efficiency, safety, and enjoyment of flying, representing a vital component in modern aviation avionics.
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