Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
Just wondering if this is a bug. The manual doesn't say this is the intended behavior, but anytime the S-TEC is on and set to NAV, it will take over vertical guidance and hold altitude, even though ALT isn't illuminated on the S-TEC.