SECTION 13: TAWS

NOTE: GNS 530 units may* display either a TERRAIN Page or a TAWS Page, (but not both) depending upon the installed hardware and configuration.

*Some earlier units are not equipped to support the TERRAIN and/or TAWS functionality, so therefore will not have a TERRAIN or TAWS page available.

13.1 INTRODUCTION

TAWS (Terrain Awareness and Warning System) is a feature to increase situational awareness and aid in reducing controlled flight into terrain (CFIT). TAWS satisfies TSO-C151b Class B requirements for certification. Class B TAWS is required for all Part 91 aircraft operations with six or more passenger seats and for Part 135 turbine aircraft operations with six to nine passenger seats (FAR Parts 91.223, 135.154).

TAWS functionality is an available feature found in GNS 530 TAWS units with main software version 6.01 or above, along with appropriate hardware upgrades. TAWS provides visual and aural annunciations when terrain and obstacles are within the given altitude threshold from the aircraft.

Operating Criteria

TAWS requires the following to operate properly:

•The system must have a valid 3-D GPS position solution.

•The system must have a valid terrain/obstacle/ airport terrain database.

SECTION 13

TAWS

Limitations

NOTE: The data contained in the TAWS databases comes from government agencies. Garmin accurately processes and cross-validates the data but cannot guarantee the accuracy and completeness of the data.

TAWS displays terrain and obstructions relative to the altitude of the aircraft. The displayed caution and warning alerts are advisory in nature only. Individual obstructions may be shown if available in the database. However, all obstructions may not be available in the database and data may be inaccurate. Never use this information for navigation or to maneuver to avoid obstacles.

Terrain information is based on terrain elevation information in a database that may contain inaccuracies. Terrain information should be used as an aid to situational awareness. Never use it for navigation or to maneuver to avoid terrain.

TAWS uses terrain and obstacle information supplied by government sources. The data undergoes verification by Garmin to confirm accuracy of the content, per TSO- C151b. However, the displayed information should never be understood as being all-inclusive.

TAWS Alerting

TAWS uses information provided from the GPS receiver to provide a horizontal position and altitude. GPS altitude is derived from satellite measurements. GPS altitude is converted to a mean sea level (MSL)-based altitude (GPS- MSL altitude) and is used to determine TAWS alerts. GPS-MSL altitude accuracy is affected by factors such as satellite geometry, but it is not subject to variations in pressure and temperature that normally affect pressure altitude devices. GPS-MSL altitude does not require local altimeter settings to determine MSL altitude. Therefore, GPS altitude provides a highly accurate and reliable MSL altitude source to calculate terrain and obstacle alerts.

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GNS 530(A) Pilot’s Guide and Reference

13-1

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3D Connexion GNS 530(A) manual Taws Alerting, Section Taws
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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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