<listitem>
<para>
After Motor. The flight software counts each time the
- rocket starts accelerating (presumably due to a motor or
- motors igniting). Use this value to count ignitions for
- multi-staged or multi-airstart launches.
+ rocket starts accelerating and then decelerating
+ (presumably due to a motor or motors burning). Use this
+ value for multi-staged or multi-airstart launches.
</para>
</listitem>
<listitem>