ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

What are Flight Deck Audible Voice Warnings?

Updated on January 28, 2020

The System - An Overview

The safety of flight has been greatly enhanced in recent years by audible warning, or alert, systems which provide the flight crew with early warning of an operational error or aircraft system malfunction.

The objective of the system is to attract the attention of the flight deck crew stating with accuracy the nature and location of a problem.

It has demonstrated over many years that it is effective, highly reliable and also, importantly, not liable to activation when flight conditions are normal. Meeting these objectives has gained the trust of pilots and also saved many lives.

There are two main types of warning systems which are found in most commercial aircraft;

The Two Types of Systems

There are two main types of warning systems which are found in most commercial aircraft;

The Ground Proximity Warning System (GPWS) which was designed to alert pilots to the fact that their aircraft is in danger of flying into the ground.

The Traffic Collision Avoidance System (TCAS) which was devised to prevent or reduce the likelihood of a mid-air collision between two aircraft.

The TCAS monitors the location of other aircraft fitted with the system and sends out an audible alert to warn pilots of any aircraft which could be on a collision course. It is installed in most commercial or business aircraft but is mandatory in aircraft which can carry twenty passengers or more.

Audible Warning Sounds

The audible warning is generally a male voice, with an urgent articulation style, in a distinct American, British or sometimes French accent depending on the type of aircraft and will normally be preceded by a sound such as a bell or horn to get the flight crews full attention.

Despite early research seeming to suggest that male pilots found the female voice more commanding, further reviews carried out since more females began working in the aviation industry, has determined that a computerised female voice is no more or less effective than a male voice.

The audible sounds are usually repeated until the crew take the required action.

GPWS Warnings

Some of the common GPWS warnings and their meaning;

“Pull Up - Sink Rate” Descending to fast

“Too Low –Terrain” Aircraft is getting to close to the ground

“Too Low – Gear” The aircraft is too low to the ground and the undercarriage has not been put into landing position for landing

“Too Low – Flaps” The aircraft is too low to the ground and the wing flaps have not been set for landing

“Pull-Up - Terrain” The ground is approaching to quickly or there is ground ahead that is higher than the aircraft is flying

“Don’t Sink” Excessive height is being lost after take off

“Windshear” Excessive gusts of wind which could affect the aircraft as it comes into land

“Glideslope” Aircraft has drifted from the glideslope when approaching to land

“Bank Angle” Aircraft is turning at too steep an angle

TCAS Warnings

There are different warnings, and actions the crew have to take, depending on how close another aircraft will pass or come into conflict with the aircraft receiving the alerts.

Some of the most common TCAS alerts and their meaning;

“Traffic, Traffic” A warning of possible conflicting traffic approaching.

“Climb, Climb” Other aircraft will pass below. Climb immediately.

“Descend, Descend” Other aircraft will pass above. Descend immediately.

“Increase Climb” Other aircraft will pass just below. Climb immediately at a faster rate.

“Increase Descent” Other aircraft will pass just above. Descend immediately at a faster rate.

“Climb, Climb – Now” Other aircraft which was above, will now pass below. Climb immediately.

“Descend, Descend – Now” Other aircraft which was below, will now pass above. Descend immediately.

“Don’t Climb” Issued instead of “Descend Descend” when the aircraft is at a low height. The aircraft must only descend if the crew can confirm it is safe to do so otherwise they will level off and remain at that height.

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

@ 2013 Brian McKechnie (aka WorldEarth)

Comments

    0 of 8192 characters used
    Post Comment
    • World Earth profile imageAUTHOR

      Brian OldWolf 

      6 years ago from Troon

      Thank you. Not a pilot just an enthusiast.

    • jabelufiroz profile image

      Firoz 

      6 years ago from India

      Interesting subject. Voted up and useful. Are you a pilot?

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://maven.io/company/pages/privacy

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)
    ClickscoThis is a data management platform studying reader behavior (Privacy Policy)