Hi m8,
I think Sabena use the compass battery of tests like OAT. If you so a search for compass on pprune and on google you will get the required info.
By the way you can't study for the compass test. At OAT they have a maths and physics portion that you can kind of study for but other than that you are on your own
.
+HB 5000
+Stealing your wallet as we speak