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Old 08-04-2020, 09:44 AM   #1
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Which Rocna or Mantus M1?

Anchors have changed so much in the past 10 years. I have a 45 foot vessel. I an going to buy a 65# anchor. Itís going to buy either the Rocna or the Mantus M1.
Would like to know those who have these which one is better regarded?
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Old 08-04-2020, 09:47 AM   #2
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Both are well liked, although with the larger, less clog prone roll bar, the Mantus is a bit better liked by some.

In terms of sizes, they make different jumps. Both make a 55 lb anchor, but Mantus then goes to 65 and then 85. Rocna goes from 55 to 73, then 88 lbs. Both do publish fluke area for comparison purposes.

Realistically, I'd pull up the dimensions for both (probably the 65 lb Mantus and 73 lb Rocna) and do some measuring to see if one will fit the boat better than the other. If one fits better, or you can fit a size bigger in one vs the other, that might make your decision for you.
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Old 08-04-2020, 10:17 AM   #3
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Both are well liked, although with the larger, less clog prone roll bar, the Mantus is a bit better liked by some.

In terms of sizes, they make different jumps. Both make a 55 lb anchor, but Mantus then goes to 65 and then 85. Rocna goes from 55 to 73, then 88 lbs. Both do publish fluke area for comparison purposes.

Realistically, I'd pull up the dimensions for both (probably the 65 lb Mantus and 73 lb Rocna) and do some measuring to see if one will fit the boat better than the other. If one fits better, or you can fit a size bigger in one vs the other, that might make your decision for you.


Good point about the physical fit.
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Old 08-04-2020, 10:30 AM   #4
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I have the 73 pound Rocna 33 on my 41' President. It works fantastic and we anchor out almost every weekend.
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Old 08-04-2020, 10:49 AM   #5
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I have the 73 pound Rocna 33 on my 41' President. It works fantastic and we anchor out almost every weekend.


Just curious, what size chain do you use?
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Old 08-04-2020, 11:12 AM   #6
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The 3/8 chain, but I am not sure if it is the BBB or HT.
I matched it to my Lofrans Tigres Windlass
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Old 08-04-2020, 11:13 AM   #7
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FWIW, I'm using 5/16" G43 chain with my 73lb / 33kg Rocna Vulcan. I'm a slightly smaller, lighter boat, however.
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Old 08-04-2020, 11:26 AM   #8
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FWIW, I'm using 5/16" G43 chain with my 73lb / 33kg Rocna Vulcan. I'm a slightly smaller, lighter boat, however.


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Old 08-04-2020, 11:46 AM   #9
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FWIW, I'm using 5/16" G43 chain with my 73lb / 33kg Rocna Vulcan. I'm a slightly smaller, lighter boat, however.


I thought I could use 5/16 but my windlass is set up for 3/8. Never had that heavy of rigging but donít want to spend the $250 to change out the gypsy.
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Old 08-04-2020, 11:47 AM   #10
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What windlass do you have? If you want to save weight, some will take 5/16" G70 on a 3/8" gypsy (the G70 links are longer). I know my Maxwell has a gypsy for 5/16" BBB and G43, then another for 3/8" BBB, G43, 5/16" G70. And both take a couple of other types too.
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Old 08-04-2020, 11:58 AM   #11
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What windlass do you have? If you want to save weight, some will take 5/16" G70 on a 3/8" gypsy (the G70 links are longer). I know my Maxwell has a gypsy for 5/16" BBB and G43, then another for 3/8" BBB, G43, 5/16" G70. And both take a couple of other types too.


Thanks. I will look into that. 5/16 is a pound a foot where 3/8 is a pound and a half per foot. Times 200í. Yikes
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Old 08-04-2020, 01:12 PM   #12
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Thanks. I will look into that. 5/16 is a pound a foot where 3/8 is a pound and a half per foot. Times 200í. Yikes

An extra 100 lbs on the bow of a 37' boat? Not sure that's even going to be felt in ANY situation . . .
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Old 08-04-2020, 02:27 PM   #13
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Have the Rocna. In my travels see about 10 Rocna per 1 Mantus on the bows of both sail and power. You will most likelihood never take an anchor apart. There’s little or no real world reason to do so. The Rocna is the best anchor I’ve ever owned. Even works well on short scope. However if to do again probably get a spade. Don’t mind the bolt there as virtually no force is placed on it.
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Old 08-04-2020, 03:28 PM   #14
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The 3/8 chain, but I am not sure if it is the BBB or HT.
I matched it to my Lofrans Tigres Windlass
Do you have a photo that shows the anchor in the pulpit? I am not sure if it would fit on my boat or not. So I would like to see if your pulpit is like mine or not.
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Old 08-04-2020, 03:43 PM   #15
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We went with the Mantus 55 and bought their swivel S3. 5/8 inch.
I made my purchase based on YouTube videos of mantus compared to other anchors.
We anchored in Matanzas inlet for a weekend. Current ripped in and out couple times a day. Never moved. 10 feet water and maybe 3.5 to 1.
I'm sure others are just as good. Could be a Ford Chevy thing. We've been very pleased with the Mantus. M1 btw. I hear the M2 has issues. Click image for larger version

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Old 08-04-2020, 03:44 PM   #16
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Sorry, 3/8 inch.
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Old 08-04-2020, 05:19 PM   #17
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Iíve only tried the Mantus M1, but so far Iím a member of the fan club for sure. Iíve got the 65 pounder for a 44í 30,000 ish pound boat. Generic swivel, and Iím not actually sure what size chain.
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Old 08-04-2020, 05:30 PM   #18
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I had the Rocna Vulcan--no roll bar. Was a great anchor.
Agree with seeing what will fit best on your pulpit.
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Old 08-04-2020, 06:38 PM   #19
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We replaced the original anchor (100# plow) with a 125# Mantus M1. Very satisfied. Mantus provides templates on their web site, which I used to make a cardboard mock-up to make sure it would fit, deploy and recover correctly. Rocna seems equivalent but was more expensive and looked like it would not fit as well.
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Old 08-04-2020, 06:38 PM   #20
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Quote:
Originally Posted by Pgitug View Post
Anchors have changed so much in the past 10 years. I have a 45 foot vessel. I an going to buy a 65# anchor. Itís going to buy either the Rocna or the Mantus M1.
Would like to know those who have these which one is better regarded?
Personally, I would suggest none of the above, because I think over all, in speed of setting, holding power, and quick and reliable re-setting on tide reversals, the Super Sarca, if your pulpit arrangement will take a roll bar, or if not, the Sarca Excel, might well just have the edge over the others, even though they are all pretty good, and they are now available in the US and Canada.
Why Anchor Right Australia is set apart from the rest - Anchor Right Australia

However, I must admit some bias, as I just loved my S-Sarca, and it never let me down - and yes, I always used it with the tripping slot, because for the odd time it fouled, (and you never know when), it saved the day.
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