Join Date: Aug 2010
Location: New Mexico, USA (Heron, Elephant Butte lakes); Arizona (Lake Pleasant)
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I like to think of three parts to anchoring, (1) selecting and setting up your gear, (2) selecting the best place to anchoring, and (3) actually doing the anchoring.
A 15 lb. anchor is generally plenty for a 16' dinghy, assuming the rode is the right length, the connections are solid, and the anchor is a decent design for the conditions. Long-term mooring is a different subject, and chafe protection for the anchor line might be an issue in windy conditions or perhaps if the boat has sharp cleats or other edges.
Site selection is about protection from wind, depth, bottom type (marked on charts or known to locals), other boats or hazards, swing with changes in wind and current, potential lee shores, and just plain old convenience.
Typical textbooks will have to prepare the anchor rode so it will go out without tangling, lowering the anchor but not throwing it, and backing down firmly but not at a breakneck pace, feeling the rode to make sure the anchor isn't skating or skipping, and taking cross bearings on the shore so you can check later to make sure you haven't dragged or moved beyond normal swings and shifts.
Beyond that, there are all kinds of "Anchor Wars" threads which will tell you which, without a doubt, is the number one supremo perfect anchor. Except for the next guy who will tell you about the REAL numero uno perfecto ultimo anchor. "Your mileage may vary."