Anchor question........ Manson vs Rocna

[NYSail]

hello all...... read a ton on anchors and actually owned a Manson supreme 35lb for my Pearson that was great would set quick and never dragged. I bought the Manson when Rocna was having the problems with cheap steel. Now looking for my new boat and was wondering how many people actually use the slot in the Manson shank?
Right now I am on the fence between a 45lb Manson or a 55 Rocna. I like how the Rocna actually considers length and weight when sizing verses Manson just by length. I respect Mainsails opinion and he has a Rocna before the Manson as per the last anchor discussion and he is in rock country. I considered the mantus however don't want to reconfigure anchor setup (but will buy their snubber!).
Thanks!

 

[RoyS]

The Rocna is welded together and the Manson is bolted. I doubt many people are ever going to want to disassemble the bolted model. When you bring the anchor up from a muddy bottom, the mud will be stuck to the joint and will be harder to shake off of the Manson with the bolts also gripping the mud. The slot is recommended for fishermen who will be tending their anchor while fishing. If you leave your boat anchored and the wind or current changes you may find your slotted anchor dislodged. I am sure both Rocna and Manson anchors will work well for holding your boat. I have the Rocna and I am very pleased with it.

 

[Maine Sail]

The Rocna is welded together and the Manson is bolted. I doubt many people are ever going to want to disassemble the bolted model. When you bring the anchor up from a muddy bottom, the mud will be stuck to the joint and will be harder to shake off of the Manson with the bolts also gripping the mud. The slot is recommended for fishermen who will be tending their anchor while fishing. If you leave your boat anchored and the wind or current changes you may find your slotted anchor dislodged. I am sure both Rocna and Manson anchors will work well for holding your boat. I have the Rocna and I am very pleased with it.

You're confusing the Mantus with the Manson Supreme.

I have never and would never use the rock slot on my Manson Supreme. I regards to my hoop anchors my Mantus sets the fastest, but they are all good anchors as are the steel Spades..

 

[Captain Larry-DH]

Manson Supreme vs. Rocna. Have both. Manson sets better in hard and weed bottoms. It has a sharper and longer tip. I can't compare holding because mine are different weights and I've never used them under comparison conditions. Both have excellent holding once set.
I would NEVER use the rock slot. IMHO it's a marketing gimmick and I'd rather run a trip line if I think it's necessary.

 

[justsomeguy]

I would NEVER use the rock slot. IMHO it's a marketing gimmick and I'd rather run a trip line if I think it's necessary.

Isn't the rock slot exactly where you'd run the trip line?

 

[NYSail]

I've heard from many that they would never use the slot as a main connection point but would attach a separate trip line from there.... Rocna has the trip line hole

 

[dlochner]

The Rocna is welded together and the Manson is bolted. I doubt many people are ever going to want to disassemble the bolted model. When you bring the anchor up from a muddy bottom, the mud will be stuck to the joint and will be harder to shake off of the Manson with the bolts also gripping the mud. The slot is recommended for fishermen who will be tending their anchor while fishing. If you leave your boat anchored and the wind or current changes you may find your slotted anchor dislodged. I am sure both Rocna and Manson anchors will work well for holding your boat. I have the Rocna and I am very pleased with it.

The couple on Sailing Uma (youtube channel) have a 15kg Rocna as their primary and a 22kg (?) Mantus for a storm/hurricane anchor for their Pearson 36. The Mantus stays disassembled in the locker until needed. They rode out a hurricane last fall in Haiti on the Mantus.

 

[thinwater]

Isn't the rock slot exactly where you'd run the trip line?

Tripping line. No, the assumption is that the rode will slide up. A terrible idea for the cruiser, but acceptable for a fisherman.
The rock slot is also in the wrong place for a tripping line. The roll bar will actually do a much better job of inverting the anchor. The rock slot will bring it up level. But this is true of most "tripping eyes." It is possible (Rocna, Spade, Vulcan, others?) to put a hole in the heel of the fluke, but the roll bar is handier to grab if you have to dive to add it.

Finally, the rock slot changes the angle of the fluke to the bottom. It seems minor, but it actually has a measurable effect on how it sets (slower in sand, but stronger in soft mud, like Fortress). I've put a load cell on this. Whether that is better or worse depends on the bottom, since there is no one right answer.

But the truth is that most days, you can't tell these three anchors apart in any practical way.

 

[justsomeguy]

The rock slot will bring it up level.

Couldn't you generate a pull 180 degrees from the direction of your anchor's set using the slot (and your engine)?
If you couldn't, one wonders why Manson even put that slot on it.

 

[thinwater]

Couldn't you generate a pull 180 degrees from the direction of your anchor's set using the slot (and your engine)?
If you couldn't, one wonders why Manson even put that slot on it.

Try it. I suspect the reason was marketing. Sometimes it sorta works. Mostly not so much.

And, after the night has past, the boat has spun a few times, and the wind has shifted, do you actually know which way the anchor is facing? You do not.

 

[justsomeguy]

Try it. I suspect the reason was marketing. Sometimes it sorta works. Mostly not so much.

While I don't use the slot, I think it's good to have the option.

And, after the night has past, the boat has spun a few times, and the wind has shifted, do you actually know which way the anchor is facing? You do not.

Having spun a few times during the night could wrap your tripping line around your rode, couldn't it?

 

[Captain Larry-DH]

While I don't use the slot, I think it's good to have the option.

Your answer is proof it is good marketing.

Having spun a few times during the night could wrap your tripping line around your rode, couldn't it?

Wouldn't matter if the rode is slack and the trip line isn't. (There are several ways to manage a trip line, but that's for another thread.)
BTW if you really want the best way to manage a trip line, and don't mind spending a bit check out the AnchorRescue Anchor Recovery System

 

[justsomeguy]

Your answer is proof it is good marketing.

True, and I'm not immune to good marketing.

Wouldn't matter if the rode is slack and the trip line isn't. (There are several ways to manage a trip line, but that's for another thread.)
BTW if you really want the best way to manage a trip line, and don't mind spending a bit check out the AnchorRescue Anchor Recovery System

Thanks for the referral, interesting system. I'll have to do some searching on anchor trip line management.

 

[capta]

We use a Rocna almost every single night of every year. Never had a problem, period.
I've never used the others of that ilk, so I can't compare.
The anchor below did catch my attention enough to snap a photo. The anchor pictured seemed to be appropriately sized for the boat.

 

[seadaddler]

That is a Mantus in photo and is the best anchor ever.

 

[capta]

That is a Mantus in photo and is the best anchor ever.

Tried every anchor on the market then, have you?

 

[PeterBld]

The Rocna is a Kiwi invention. Although the Aussies will probably claim it's theirs.
I think Manson added the slot to avoid Patented design problems.