F111,
aus.aviation is a newsgroup (aka discussion group)on Usenet. Usenet, though part of the Internet, is not part of the WWW, so you cannot use your web browser to see it.
You most probably already have access to usenet through your ISP account, but sounds like you don't use it. What you have to do is configure your email/news proggy to
1 Connect to your ISP's news server (check with your ISP for settings)
2 Download a list of newsgroups (there are tens of thousands, but it only takes a few minutes)
3 From that list subscribe to the newsgroups of your choice (in this case aus.aviation). "Subscribe" in this case does not mean part with cash. It just means automatically collect the messages that appear in the newsgroups you select.
Most email clients can do news as well, so chances are you have all you need, you just need to set it up. If you need more info, email me. (Address in profile)
AA