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Old 06-19-2019, 10:08 PM   #1
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Dinghy anchor for muddy river

I know anchors are a touchy subject, heh.

Anyway, just finishing outfitting a Highfield CL310 (10í long) with a 20hp Mercury.

We boat on the Mississippi up in Minnesota. Iíll be using the dink to explore, take the little kids fishing while mom sleeps in on the big boat, just general messing around.

Depths where Iíd need to anchor are probably 20 feet max. The Mississippi and St. Croix are muddy and sandy generally.

Anyone have a good anchor idea? Seems like the choices are many. Folding mushroom type? Mini danforth?

As always, thank you for your thoughts!
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Old 06-19-2019, 10:23 PM   #2
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I boated those rivers for years before moving to Lake Superior. On my 29' I had many bad experiences with danforths but never dragged with my Manson Supreme. The real issue is current, pure and simple.

Manson is overkill for the dink but I'd get something that digs in easy. I'd skip the mushroom. Or just tie to shore.
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Old 06-20-2019, 01:16 AM   #3
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I’ve used both a folding grapnel of about 5 pounds and a little 2 pound Claw. Both worked ok for me. I put maybe 3 feet of 3/16 chain and 50 feet of 3/8 rope on them. The grapnel was easier to stow on a small inflatable.

Of course both of these anchors were the wrong kind, too small and I didn’t have enough chain.
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Old 06-20-2019, 06:01 AM   #4
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I vote with Parks on the folding grapnel. If it doesn't hold, go up to the claw.


I went the other was as someone gave me a claw, but it was way too much for my use in my 10' inflatable.
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Old 06-20-2019, 07:48 AM   #5
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Mud and sand under the dink you want blade area. I use a danforth. The grapnel has value with coral/rock, which you didn't mention. My dink buddy boat had the folding grapnel in the islands; we all thought them to be pretty useless in soft stuff, but they store nicely.
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Old 06-20-2019, 07:52 AM   #6
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Fortress Commando might work well, but it is fairly large for a dinghy.
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Old 06-20-2019, 08:05 AM   #7
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Mud is a wide generic term from soupy to sticky. Everything holds great in "average" sand.


Dinks usually don't need much holding unless you leave/have them out in moderate to severe conditions...at which point I would leave one anchored anyway and if caught in a squall, well don't cause being anchored in a funk in a chip is no place to be.

The pictured grapnel isn't a true one as the folding blades do have much better holding than a grapnel with just bar flukes designed to pull out of wrecks or rocks


Sure a bigger harder to stow anchor may be needed...just depends on how one does things.
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Old 06-20-2019, 08:10 AM   #8
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I agree. In the mud you need blade area and the grapnel just doesn’t have it. A Danforth type or a Fortress with 10’ of chain and 100’ of 3/8 nylon will work well in those conditions.

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Old 06-20-2019, 08:22 AM   #9
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I switched to a mantus dinghy anchor and it works well. Mine is not the collapsible one. It stores easily in the bow locker, along with a bunch of other stuff, of our 9.5’ highfield.
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Old 06-20-2019, 08:27 AM   #10
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But Captain, I am only making engineers salary! 199$
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Old 06-20-2019, 08:30 AM   #11
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Quote:
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But Captain, I am only making engineers salary! 199$
Not the stainless one!, no roll bar either, about $50 bucks, still a little pricey, but in the grand scheme of things....
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Old 06-20-2019, 08:49 AM   #12
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Quote:
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But Captain, I am only making engineers salary! 199$
Hey thatís what I have. Just came in two days ago. Havenít tried it yet.
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Old 06-20-2019, 09:00 AM   #13
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I would avoid any anchor with a sharpened tip. You donít need much for a 200lb inflatable+engine. Just an ordinary danforth copy but make it 15-20 lbs. that should hold in a full on gale. I had a 22lb with 3í of 3/8Ē and then polypropylene line. Held perfectly always on a 2000lb boat.
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Old 06-20-2019, 09:07 AM   #14
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A quick look on line and I can’t find the 2.5# mantus I have. They must have discontinued it. Looks like they are stainless, collapsible and have roll bars and are part of a kit. I suppose it will store easier if collapsible.
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Old 06-20-2019, 09:24 AM   #15
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In what kind bottom does one usually anchor ..... MUD.
So the only real reason you want a special anchor is;
1. Good chance of loosing it.
a. Because of all the garbage from man and nature you’re much more likely to loose an
Anchor in a river. Avoid Danforth types as they snag on things.
b. And avoid using an expensive anchor because you have a high chance of loosing it.
c. Low holding power is fine .... don’t need much.

Cheap and low holding = Claw .. used and not a Bruce. Lewmar, no name ect ...
And if you’re worried about loosing that have two on hand.
I just gave away an 18lb Danforth. Use a Dan if cheap enough. For that matter the only high priority of a river anchor is that it’s cheap ... disposable.
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Old 06-20-2019, 09:48 AM   #16
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Thanks all for the replies. The Mantus looks cool, but may be overkill.

Realistic anchoring for me for the next few years will be fishing with a 6 and 7 year old, means anchored in likely a safer location for short amounts of time....based on their attention span.

Also kind of want something more than oats to stop me from drifting somewhere I donít want to drift in the river if there is a problem. May try the cheap collapsing grapple to start.

Thanks again!
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Old 06-20-2019, 09:56 AM   #17
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I like this type for the dinghy. It's galvanized, has decent holding power, can be pulled out backwards and is inexpensive.
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Old 06-20-2019, 10:44 AM   #18
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I agree w kchace. There are numerous old tripping Danforth types and here is another one.
Also I see very small Navy type anchors on the cheap that are cast iron. Here's a pic of a full sized Navy anchor.
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Old 06-20-2019, 11:55 AM   #19
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we were way overdue for another anchor thread.
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Old 06-20-2019, 12:28 PM   #20
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we were way overdue for another anchor thread.

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