If I was in the RN and saw that advertisement i'd leave that paper floating in mid air on my way out the door [mind you I would want a written assurance by the RAN that I would not be gang raped in the name of "banter" first ] .Depends - manning is an issue, but its always been an issue for the RN. But the problem that the Aussies have is slightly wider than the RN - its essentially a fulltime dependency on hoping that you can entice ex-RN and increasingly ex-USN personnel down under to do 5-6 years to provide skills and capabilities that they cant recruit, retain or generate themselves. It costs them a fortune in offering it, knowing that a reasonable number of the ADF has to be provided from by overseas on an enduring basis, not just to fill the odd gap.
Navy News is regularly full of recruiting adverts for the RAN and RNZN - these forces structurally can't work without significant external assistance. The RN currently is gapped in places by contrast, but has the training schools and career pipelines to fix the problem over time internally - although this does take time.
But it seems to me our retention of skills is only going to get worse what with these attractive incentives ,the fact young people have good opportunity's in civvy street and the unfortunate fact the RN very rarely sees the "25 year men" as often as it once did hence when a sailor gets trained into a skill now he can easily head into a far better paid job out of service .