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Terrain Awareness and Warning System (TAWS)

Overview

The TAWS system in the mod is inspired by a Honeywell EGPWS suite, inherited from the base model. It's a custom implementation based primarily on FAA advisories and the pilot's guide.

Details about the supported modes are here.

Configuration

You can select between different TAWS loadouts:

  • Full: every callout on every variant

  • Typical: passenger variants get the full set; cargo/utility variants get the reduced Class B set

  • Legal minimum: passenger variants only; cargo/utility variants get nothing

  • Class B: the reduced Class B set everywhere (excessive descent rate, altitude loss after takeoff, the "500 feet" callout, and MINIMUMS — no terrain, glideslope or bank-angle callouts)

  • Off: all callouts muted

You can also select between different voice banks based on personal preference. Only the "Custom" set contains all possible callouts.

Features

  • Declutter governor: an advisory is only repeated if the situation degrades.

  • The GPWS INHIB button suppresses some callouts and desensitizes others.

  • A TAWS tab in the EFB app (visible in Instructional mode) is trying to give you the tools to understand why and when TAWS callouts trigger.

  • TAWS uses the Twotter's custom navaid system and runway information obtained from the sim.

Tip

I filter out small grass and dirt strips, because they wouldn't be covered by the database of an EGPWS suite. To minimize the number of spurious callouts when approaching a small strip, you should make use of GPWS INHIB.

Known issues

  • Windsheer alerts are missing (no sim data).

  • Lower priority callouts cannot be interrupted by higher priority callouts.

Reviewed 2026-08-11.