We have a 19' sailboat that displaces about 2000 lbs. This year it will be slipped in Gilford but I'd like to put it on a mooring in our Association's mooring field. The field is near Elacoya State Park so there's a long fetch with a NW wind

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I have a mooring set up like the .jpg attached with a 50 lb. mushroom anchor that was used for a smaller 15' daysailer in a lake with a mud bottom.
I assume that the 50 lb. mushroom isn't nearly adequate for the new boat in an area with a sand bottom.
What type of mooring block holds well in sand and does anyone have a formula for determining how much the anchor should weigh to keep my boat off the lee shore?
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