In the RAAF, after completing a Basic Course (ADI) you were issued with a Diploma of Aviation and after completing the Approach course you were issued with an Advanced Diploma of Aviation. These were NVQ approved / recognised in Oz. Not sure of their value in Oz but in middle Europe the Dip Av on my door name tag is a curiosity for most and far more interesting a discussion point that the BSC advertised next door!!
BD