on bottom types above is good. I would recommend that you be more specific about your anchoring
so that you can get the best system for you. The biggest question will be, what are the worst conditions that you will anchor in? Since you will be anchoring in an area prone to severe thunderstorms, I would recommend getting a setup that will hold in a decent anchorage in at least 50 knots of wind
. If you plan to be extremely conservative about when you choose to head out or you never go far from your home mooring
and watch the weather
, it may be practical to size for something like 30 knots.
Here are some specifications that I like to use in anchor selection:
Holding power (>1000 lbs in mud/sand would hold you in most squalls)
Sets reliably in mud, sand, grass
Resets/veers reliably in mud,sand, grass (important if you plan to leave the boat or sleep)
Stows well on the boat
There are probably others that you should think about too.
Starting with setting, this is an area where there has been a lot of progress recently. The new generation anchors (Manson, Rocna
, Spade, Mantus
, etc) will outset just about all of the other anchors out there in the bottoms that you choose. The delta will do a fair job but there are places where it will struggle. The danforth will struggle a lot in some of the bottoms. The grapnel will actually "set" well in all of the bottoms meaning that it is buried but it will not generate significant holding power.
Looking at veering next, the new generation are the best here as well. The delta will do okay here but it is not ideal. The danforth does particularly poorly in this area. The grapnel will do okay.
For holding power, the absolute king is the fortress
anchor which is similar to a danforth but it does not do well in veering and can be difficult to get to set in some bottoms. The new generation anchors do quite well here. The delta does okay but tends to plow a furrow in some types of bottom. The danforth will do well if you can get a good set. The grapnel will do particularly poorly. The trick with holding power is figuring out how to size the anchor for the holding power that you want. Using data from anchor tests can help a lot here and looking at manufacturers recommendations can help a lot. I particularly like the recommendations of Rocna
as they are based on 50 knot
winds with moderate fetch and decent holding bottom which is not that dissimilar to some T storms you may encounter. Most manufacturers base their recommendations on something like 30-40 knots of wind
so going up 1-2 sizes is needed if you want more than a casual anchor.
My personal recommendation would be a 25 lb new generation anchor unless you don't worry about T storms and then it would be a 15 lb. The reason that I recommend this is that I feel it represents the most well rounded anchor. A delta would certainly do the job but you probably need to go up a size and be a bit more careful when setting it.