SECTION 10 – HAZARD

AVOIDANCE

TAWS Inhibit

Flying VFR into an area where unique terrain exists could cause the system to annunciate a nuisance alert. When TAWS is inhibited, only FLTA and PDA alerts are disabled.

Inhibit TAWS:

1)While the TAWS Page is displayed, press the MENU Key.

2)Turn the small FMS Knob to select‘Inhibit TAWS’.

3)Press the ENT Key.

Enable TAWS:

1)While the TAWS Page is displayed, press the MENU Key.

2)Turn the small FMS Knob to select ‘Enable TAWS’.

3)Press the ENT Key.

Manual System Test

A system test is automatically performed at power-up. After sucessful completion of the test, “TAWS System Test, OK” will be heard.

The system test may also be initiated manually, but only when the aircraft is on the ground. To manually verify proper operation of the aural and visual annunciations of the system, perform the following steps.

1)While the TAWS Page is displayed, press the MENU Key.

2)Turn the small FMS Knob to select ‘Test TAWS’.

3)Press the ENT Key. During the test ‘TAWS TEST’ is displayed in the center of the TAWS Page.

When all is in working order, “TAWS System Test, OK” will be heard.

Forward Looking Terrain Avoidance (FLTA)

The Forward Looking Terrain Avoidance alert is composed of two sub-functions:

Reduced Required Terrain Clearance (RTC) and Reduced Required Obstacle Clearance (ROC)

This provides alerts when the aircraft flight path is above terrain and/or obstacles, yet is projected to come within minimum clearance values outlined in the following table. When an RTC or ROC alert is issued, a potential impact point is displayed on the TAWS Page as a yellow or red ‘X’.

Imminent Terrain Impact (ITI) and Imminent Obstacle Impact (IOI)

This provides alerts when the aircraft is below the elevation of terrain in the aircraft’s projected path. ITI and IOI alerts are accompanied by a potential impact point displayed on the TAWS Page as a yellow or red ‘X’. The alert is given when the projected vertical flight path is calculated to come within minimum clearance altitudes in the following table.

Phase of Flight

Level Flight

Descending

Enroute

700 ft.

500 ft.

Terminal

350 ft.

300 ft.

 

 

 

Approach

150 ft.

100 ft.

 

 

 

Departure

100 ft.

100 ft.

During the final approach phase of flight, RTC/ROC/ ITI/IOI alerts are automatically inhibited when the aircraft is below 200 feet AGL while within 0.5 nm of the approach runway or is below 125 feet AGL while within 1 nm of the runway.

Premature Descent Alert (PDA)

A Premature Descent Alert is issued when the system detects that the aircraft is significantly below the normal approach path to a runway. The PDA alert mode functions only during descent to land.

PDA alerting begins when the aircraft is within 15 nm of the destination airport and ends when the aircraft is either 0.5 nm from the runway threshold OR is at an alti- tude of 125 feet AGL while within 1 nm of the threshold. During the final descent, algorithms will set a threshold

10-12

Garmin G1000 Cockpit Reference Guide for the Columbia 350/400

Page 101 Page 103
Page 102
Image 102
Garmin Columbia 350/400 manual Taws Inhibit, Manual System Test, Premature Descent Alert PDA
Page 101 Page 103

Columbia 350/400 specifications

Garmin has long been a leader in navigation and communication technologies, and the Columbia 350/400 series epitomizes its commitment to providing high-quality devices for adventurers and outdoor enthusiasts. These handheld GPS units offer an array of features that cater to both casual hikers and serious explorers.

One of the standout characteristics of the Garmin Columbia 350/400 is their robust design which is built to withstand the rigors of outdoor use. With an IPX7 water resistance rating, these devices can endure rain and even immersion in water, allowing users the confidence to carry them on any expedition. The rugged casing and reliable construction also ensure optimal durability in harsh environments.

Both models feature a high-sensitivity GPS receiver that ensures accurate positioning even in challenging environments with thick foliage or urban canyons. With its advanced satellite reception technology, users can expect fast and precise location tracking, which is critical for effective navigation.

The Columbia 350/400 series comes with a vibrant, easy-to-read display that enhances visibility under varying lighting conditions, making it easier for users to navigate trails and roads alike. The intuitive interface allows for smooth operation, enabling users to access their maps, tracks, and waypoints quickly.

Navigational maps are a vital component of these devices. Garmin equips the Columbia series with preloaded topographical maps, providing detailed terrain information that is essential for off-road navigation. Users can also customize their maps and download additional topographic data, ensuring they have the most accurate and relevant information for their adventures.

Another key feature of the Columbia 350/400 series is their long battery life, which ensures that users can rely on them during extended trips. The devices can run for hours on end and even incorporate a battery-saving mode to extend usability during longer journeys.

Additionally, the Columbia 350/400 supports various outdoor and fitness tracking features. Users can monitor their speed, distance, and elevation gain, enabling them to keep track of their physical performance. This makes the devices suitable for athletes and outdoor enthusiasts alike.

Overall, the Garmin Columbia 350/400 series combines durability, advanced navigation technology, and user-friendly features, making it an excellent choice for anyone looking to explore the great outdoors with confidence. Whether you're hiking, trekking, or simply navigating unfamiliar terrain, these handheld GPS units provide the tools necessary to enhance your experience and ensure you never lose your way.
Top Page Image Contents