Air Force FCU has some competitive certificate rates on terms from 1 to 5 years. Rates vary by deposit size. The rates for a minimum deposit of $100K range from 5.55% APY for a 12-month CD to 5.75% APY for 36 and 60-month CDs. The rates are 0.20% less for a $25K minimum deposit, 0.25% less for a $12.5K minimum, 0.30% less for a $2.5K minimum and 0.35% less for a $1K minimum. The $25K minimum rates are just above the $20K minimum CD rates offered by Navy FCU (except for the 60-month term).
Field of membership includes all US Armed Forces (either active or retired) which may make this more open than Navy FCU (see post). However, they don't seem to provide any easy ways to qualify like what Pentagon FCU provides (see post). Please refer to the Air Force FCU eligibility page for the FOM details. Membership requires a minimum $5 deposit into the regular savings account.
Branches are located in San Antonio, Texas. The credit union is federally insured by the NCUA (Charter # 8169). It's much smaller than both Navy FCU and Pentagon FCU with total assets of $262 million and 39,298 members.