The Helms 25 has 1650# of fixed ballast in a short fixed keel with a 300# steel centerboard. The centerboard swings up into the fixed keel. With the centerboard up the draft is 20". With the centerboard down the draft is 6'. However, you don't need to sail with the centerboard fully extended. Lowere it just enough to balance the weatherhelm.
I hope this helps.