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Mantus Galvanized M1 Anchor

How and why we updated our anchor and tackle



Have you ever had problems with a dragging anchor? Like many boaters, we have dragged anchor on a few occasions, which always involved exciting moments. I always felt that our anchor for our O'Day 31 was undersized, and our anchor rode also needed some improvements.

Two different anchor types came with our boat: a fluke-type anchor and a plow anchor with the swivel joint (CQR). We wanted to improve our holding power when looking for a new anchor. We looked at the different types of anchors on the market, researched them, and decided to go with a scoop anchor. The two most popular brands were Mantus and Rocna. 

We contacted Mantus and asked them which anchor weight we should get. They talked with us and asked several questions about how we would use the anchor.

They referred us to their website, which contains a lot of information and is a great resource. Mantus has an anchor sizing web page based on boat length and weight, which is worth checking out. Our boat, which we use for cruising, is an O'Day 31 and weighs 10,000 pounds. We don't have a windlass on our vessel, so this was one factor in determining our anchor size/weight. Based on the information on the Mantus website and after speaking to a Mantus employee on the telephone, we decided to go with the 25-pound Mantus M1 anchor. After looking at this anchor's dimensions, I worried it might not fit on our bow roller. Mantus emailed me an actual size template for the anchor, which I printed out and taped to a cardboard piece and cut out the pattern. I used the template to check the anchor fit on the bow roller. The "tip" of the anchor would be too close to the bow. I phoned Mantus back and described my concerns. They told me about the Mantus AnchorMate product, which will mate an existing bow roller with an anchor of any design. With the AnchorMate product, we fit the 25-pound M1 anchor on our boat with our existing bow roller. I was relieved because we use our anchor for cruising and wanted more holding power. I didn't want to downsize the anchor or replace the bow roller.

 During our research, we also determined that we needed to improve our anchor rode. We had approximately 20 feet of chain with 200 feet of line. The research I saw indicated that the chain length should be at least our boat length, so we extended it to 31 feet long. The extra chain gives us more weight to stay on the bottom when anchoring, and our line is less likely to get chafed. 

 Mantus Anchor Template for 25 Pound Anchor25 lb Mantus Anchor with AnchorMate


We have tested and used our Mantus anchor several times and are very happy. On our first use of our new anchor, we used the anchor as a day anchor. It was a good test case because a small storm came through, and the wind went through a 360-degree wind shift over about an hour. As far as we know, the anchor held well during this period. If the anchor did pull loose, it quickly reset, and we felt secure the entire time. When we left the anchorage and were pulling up the anchor, we learned that the anchor held well because it had dug into the bottom.

Our anchor's next good test case was in Willsboro Bay, NY. We headed down to Willsboro Bay from Malletts Bay, VT, and spent the night. We anchored at the south end of Willsboro Bay with a North/Northwest wind blowing 10-20 knots with 2-3 foot waves all night, even though the forecast was for calm winds. We had 30 feet of chain with about 95 feet of rode, which gave us 125 feet total scope, and we were in about 20 feet of water (approximately a 5:1 scope). The boat bounced all night due to the waves and wind, but the anchor performed well, and we did not drag. We had our anchor alarm set on our GPS, and I could see our "tracks" as we swung back and forth all night on our anchorage.

We are thrilled with our new Mantus anchor and improved rode. When anchoring overnight, it helps to have confidence in your anchor equipment and to ensure that the anchor gets set solidly. Anything we can do to remove fears about the anchor dragging at night is welcome and allows boaters to sleep better.

We would love to hear about any anchoring stories you may have.

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