The minimum educational standard for entry to the Acoustic Warfare Analyst Category is successful completion of Year 10 level, which must include passes in English and Mathematics. However, you may apply while still studying Year 10,

or

If you do not satisfy the education requirements for this trade or do not possess evidence of your educational attainment there is an alternative pathway available to you.

You may sit an Alternative Education Equivalency (AEE) Assessment to ascertain your ability at the required educational level for this trade.

Further information about this scheme is available  here.