-- Last Updated: Jul-12-10 10:36 PM EST --
...... a tandem canoe .
It's similar to the mushroom type but instead of the full mushroom it has three ears that look like the radiation symbol . You could use the lighter 9 lb. of that style , I just like the heavier one for back up reasons .
Here's a link to show you a river anchor ,
http://www.premiumpowersports.com/River-Anchors-p-1-c-29.html
the vinyl coating is nice too , good for hands and boat . A river anchor holds well in soft lake bottom or river rocks , frees fairly easily for retrieve , and clean off good .
When you are talking weight of anchors , I can only think dead weight as in mushroom , pyrimid type or similar , like anything that is a weight , barbell , cinderblock , etc. .
When you are talking fluke anchors , you are talking holding power against certain criteria like "boat weight" & length , wind speeds , tidal flows , etc. ... the fluke anchor that holds a 3000 lb. boat in high winds and fast tides may only weigh 6-7 lbs. .
Fortress is the fluke anchor I like best (but that's for power boat and tidal salt waters) ... it's very light compared to a steel one , but very strong .
The smallest Fortress fluke is a #7 , way to much in size and strength for what you need in a paddle boat .
Why would want a fluke anchor for a paddle boat anyway , especially in a lake ?? In order for a fluke anchor to be of any use you have to pay out enough scope (minimum 5 to 1) in order for it to "make bite" , and to hold bite you need to have a constant pressure being pulled on the rode line , like a tide and/or wind . You need a drag chain for a fluke also .
http://www.fortressanchors.com/fortress_anchor_guide.html
My advice , get a min. 8 lb. river anchore (I like 12 lb. better) , deploy/drop it over the side by hand , set it by hand , retrieve it by hand ... don't use a windless or other type deploy/retrieve system for a paddle boat .
If you are considering a gaffel type , consider how well they snag up on every thing in the water , like trees , rocks , cables , etc. ... ever tried to free an anchore that is snagged up ??
"Never" anchore your boat unless you are sure you have a good sharp knife handy ... remember that .