The USAV Academy will not log you out as long as you are active and progressing through a course (no matter how long that takes).
But, the system will automaticlally log you out after 20 minutes of inactivity. Doing this is like writing a term paper in Word and not clicking Save before walking away from your computer (anything can happen).
When this occurs, your progress until that point should be captured by the software. But, you may well need to "Save" your progress when you return to the Academy.
* Log into the Academy
* Launch the desired course
* Instead of the Lesson Go button, you will see to icons: Save or Discard
* Click Save