What size Forttress Anchor to mount on the Pushpit?

[ferroboat]

We have a 44' ketch with a 65lb cqr as a bower achor. I would like to mount a stern anchor on the pushpit and am thinking of a Fortress. what size does anyone think i should go for? Please don't just suggest the biggest i can afford. Thanks in anticipion.

 

[Rigger Mortice]

http://www.fortressanchors.com/fortress_anchor_guide.html

 

[multihullsailor6]

It also depends on your cruising ground. If you expect to anchor in narrow tidal waters like one finds in the Bahamas you want a full-sized Fortress on the stern, if it is more for "coffee anchoring" you could drop down a size.
I have a FX 23 on the stern of my 10.2m catamaran and feel happy with it as a kedging anchor, so from this point of view a FX 37 might well be a good choice for your boat, boat's weight depending.