Yes, the "securely anchored" comment in post #87 is puzzling to me as well. It could well be BS. If anchored then I would have thought someone ought to have stayed aboard. If no volunteers, then the Captain.
If the Australian Navy went out of their way to collect the crew just because they were feeling queasy/seasick then the owner deserves an invoice. Its one thing to rescue people if their life is in danger. An N96 that is "securely anchored" may well be uncomfortable, but lives in danger seems unlikely.
Winds abate, and seas settle in a few days. They ought to have known the weather forecast, and they choose to start a transit with that forecast. I don't have it, but likely it was "strong winds for a few days" or similar. Whatever the forecast was the Captain decided the N96 could handle it. He was probably right. If "securely anchored" then bow is into the wind and waves and it would also be no problem for the vessel. But then, it seems, ignore the forecast - "get me outa here, I ain't feelin' so good" and I don't want to wait a couple of days for it to become safe to dive. The Captain has some explaining to do, and given taxpayer $$$ were involved in the crew rescue the full story needs to be made public.