Some of the upgraded Alpha Jet aircraft and the additional unit of C130 Hercules can be seen here in this video screen grab.
PHOTO CREDIT: INFORMATION NIGERIA
In September 2013, the Aeronautical Engineering and Technical Services Limited of the Nigerian Air Force, in partnership with Sabena Technics of France, delivered a total of nine Alpha Jet aircraft and a C130 Hercules military transport plane to the Nigerian Air Force with a view towards boosting the combat operations of the NAF at this time. All ten aircraft are pre-owned assets and were merely upgraded to meet the specific mission requirements for the ongoing combat operations in NE Nigeria.
Earlier in July 2011, the Nigerian Air Force had also taken delivery of four upgraded units of Alpha Jet from the AETSL. Post-upgradation, the Alpha Jet planes featured elongated nose cones which suggested a new avionics fit and also the A-Jet were returned with six hardpoints, as against the original four hardpoints which they had at the time of induction in the 1980s and all through the ECOMOG era (1990-2000) during which NAF A-Jet aircraft undertook roughly 3,000 combat missions.
Back to the present, it therefore means that a minimum of thirteen upgraded Alpha Jet aircraft have been delivered to the NAF (four units in July 2011 and nine units in September 2013), one of which was lost during an air border patrol mission in Niger Republic during the month of May 2013.