Ann: Alchemy Commences Drilling at Karonie Gold Project, page-12

Aircore can go to a depth of 300ms in good conditions, but it can't penetrate fresh rock. It's for drilling weathered regolith and usually precedes RC and/or D.

Here is an abbreviated Fig 2. The EW black lines are the 4 targets and they vary in length between 700 and 1200ms. The lines are between 2kms and 4kms apart. Aldiss is probably 4kms south of the one above etc

The ann does not say how many drill holes there will be, but my guess would be somewhere between 50 to 100, allowing for depths between 140 ms and 70 ms respectively