If you have read through all of the Rookie forum follow the other advice it gives.
Have you got a good technical background (should do but depends on what your trade is), are you better off spending resettlement money on NVQ/SVQ’s? Get a CV together (see the FAQ link off to the left on CV advice), start sending CVs out to companys, see what their feedback is. If you can get to Aberdeen, try and speak to ROV Ops Managers, see what they are looking for.