[KirstyM]

Helloo Mini Kev!

The thing is, although many keyword rich domains will rank right from the word go, in a more competitive keyword environment things may just need a little more work. I've had a few similar domains like this.

As per the advice above, don't over-analyse and keep adding relevant backlinks and content. You could try mentioning more keywords in the home page title also. i.e. Dive Computer UK : Diving Equipment : Dive Computers

Also, use your internal pages to your advantage. Have every page link to the home page with the anchor text "dive computers". That'll help Google know that your page really is all about dive computers!

I've had domains where its taken several months to get to the top and some where it's never happened but I've eventually manged top ten.

Good luck