We have recently identified an anchoring
problem that has been bothering us for over a year. A bit of background first:
We purchased a 27kg Manson Supreme in New Zealand
in 2009. Our 25kg Delta
had been doing a great job for many years. However, after a 30+ knot
squall came through when anchored in Tahiti
in 2008, I dived down to view the tracks in the sand left by our Delta
and a neighboring (and similarly-sized) boat's Manson. The Manson had reset much faster – I was sold
We've been extremely happy with our Manson and have spent years (literally) at anchor
hanging on it.
We used a WASI Powerball until 2019. The Powerball was by then 20 years old and I thought it prudent to replace it. We purchased and installed a Mantus Anchor
Swivel S2. During the last year, we have had occasional difficulties setting our anchor in places that should have been easy given the depth
and bottom. Last July, at Isla Monserrat in the Sea of Cortez
(Mexico), we were having so much trouble that I ended up diving
down to watch the anchor while my wife drove the boat
. I found the anchor was lying on its side and dragging. I stood it upright and then it set.
This year, with our plans to return to French Polynesia
thwarted by the pandemic, we ended up staying in Mexico
again and have since visited many of the same places we anchored last year. In several of these spots, we had problems getting our Manson to set.
One of the problems with the Mantus
swivel is that it does not fit well on the lower (normal) hole of the Manson’s shank. Thus we were forced to put it in the upper slot. We would rather not have done this as we feel the slot is a bit gimmicky and prefer the regular hole in the shank. Thinking that perhaps the anchor set problems were caused by using the upper slot, we replaced the Mantus swivel with a regular shackle and connected the chain to the lower hole.
This change corresponded with us revisiting 5 anchorages
that we had just visited the week before – some of which we experienced anchor set problems in --- including the anchorage on Isla Monserrat where we had problems in 2019 & 2020.
I cannot tell you how happy we were to discover that the anchor set the first time at every single
anchorage. Suddenly we had our old anchor back! During our 60,000+ miles of cruising, we have anchored so many times in so many conditions that we can often tell pretty quickly when we get a good set – even before we back down. It was clear that the way the anchor behaved changed when we removed the Mantus swivel.
Apologies for the long story but I want to back this up with our experience. In short, I would NOT recommend using a Mantus swivel with a Manson Supreme.
In 2016, Practical Sailor wrote
about the Mantus swivel “This swivel’s weight could impact anchor balance as it sets…”
They were absolutely correct in their concerns.
I am sailing in the Sea of Cortez
right now and only have occasional internet
– so apologies for long delays if there are any questions.
Isla Coronados, BCS, Mexico
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