Hello Kevin! Welcome to ET, I know you'll have a great time here. Here's what I found on one website about diving to different wrecks, hope it helps.
HMS Hood Location 50 34.07N 02 25.12W
Place Portland Harbour - Dorset
Description: 14,150 tons, 380x75ft, Royal Sovereign class battleship. Built at Chatham, launched 30th July 1891.
Cargo: N/A
Voyage: N/A Depth: 18m (at low water her bottom is about 2m from surface)
Sunk: Scuttled Nov' 4 1914 to protect harbour from marauding German U Boats.
Diving: Diving must be planned in relation to tides. The Hood lays upside down, and reasonably intact. Buried up to gunwales in seabed, which consists of rock and silt. Some plates are missing and there is a large hole in the centre of the hull. Do not be tempted to enter the wreck as she is now in a fragile condition and you may dislodge sections of the structure, bringing it down on you!
http://www.danymor.co.uk/site/weymouth.htm
Check out the site, it's pretty good. You have to scroll down a bit to find the facts on the Hood but it's worthwhile.