The "Aar" in the uniquely spelled word "Aarow" stands for an After Action Review (AAR). This is why the word arrow is spelled differently. The AAR is intended to improve on lessons learned following an event to develop best practices for future events.
The arrow on the "A" is pointing to the left indicating lessons learned from the past. The "Aar" is surrounded by the sun symbolizing the AAR actions being implemented and utilized during "blue skies."
"Prep" stands for preparedness. The arrow in the lowercase "p" symbolizes the improvements implemented from the AAR being utilized during the next "grey sky" response thus pointing up to the cloud. It also symbolizes looking up to an improved response in the future.