I just find out that I misspelled the word. It should be Rhadamanthus. Sorry.
I got the question from John Robert's Battlecruisers but here is from the internet:
"In a brief letter to the Director of Naval Construction dated 12 December 1914 Fisher gave his staff requirements; ‘Battle cruiser Rhadamanthus. Speed 32 knots - Six 15 inch guns - Twenty 4 inch automatic guns all on top deck (20° elevation) Range (? yards) (30° elevation Range 14,000 yards) - armoured like Indefatigable - 2 Torpedo Tubes - All oil - Radius of action at ( ) knots ( ) miles. Freeboard forward 35 feet aft ( ) feet. Length 750 feet - Beam ( ) feet.

That’s the sort of label to put on the model. I’m sure you’ll benefit by 750 feet instead of 720. The Rhadamanthus will immortalize you.’" from:HMS Renown – Battle-cruiser 1916 - 1948 » Naval Historical Society