CIRA stands for "Le centre d'interprétation et de reconnaissance acoustique", so a naval institute devoted to interpretation of acoustic signals
As such the main character belongs to that unit and the top officer that scolds him after he comes ashore for wrong classification is his boss.
To answer the question about magic points:
Oh and TUUM is indeed an underwater telephone as Jaop mentioned, a "digital underwater communication system". It's produced by Thales, you can find the data sheet
here.