AFROTC has 4 boards. Dec. is the 1st board. Than I believe the 2nd is early Feb. Mar will have 2 boards.
AFROTC tweaks it every year. The newest tweak, and why you think it is only 1 board, is last year they started reboarding only on the last one in March. IOWS, if you are not selected in Dec., they can say No right off the bat, or they can say we will wait until the last board in March to decide.
~ A/NROTC is different you will be reboarded each and everytime they meet.
AFROTC stats are about the same @16-18% of all candidates will win a scholarship. AFROTC has about 900 scholarships offered. 80% of all scholarships are a 4 year Type 7. That means they will only pay the equivalent of IS tuition. You can go OOS or Private, but if it is more than the cost for IS, than you need to convert to a 3 year Type 2. Type 2 maxxes out at 18K currently.
~ Type 1, 4 yr. scholarships make up @5% of all scholarships. @45 nationally. 95% of those scholarships are STEM (Tech) majors. That equates to about 2-3 go to non-tech
~ Type 2, 4 yr. scholarships make up 15% of all scholarships. Again, 95% are STEM. less than 10 will go to non tech
~Type 7, 4 yr. make up the remaining 80%. 75% go STEM/Tech.
Many kids think that because it is ROTC their chances are higher than applying for an SA appointment. However, statistically it is about the same chance, and the avg stats for a ROTC recipient mimics the same stats for an SA candidate.
~ The difference is ROTC is a national pool at all times. SAs start from a geocentic pool (MOC), if not appointed from that pool you go to the national list and fight for an appointment that way.
Good luck