After many years on boats, anchoring on different types of seabed, I can say that it's a good advantage to have different anchors on board.

I just hope you understand how much some of us appreciate your ‘hobby’. The course that made me drop out of graduate school was called “ Multivariate Factor Analysis “ and it relates to what you’re doing. Hope you have better luck mastering it than I did.

A most valuable and appreciated hobby.

Thank you so much for your efforts. You have done such a great job teaching the boating community everything we ever wanted to know about anchors and anchoring. I am certainly much more prepared to anchor safely after seeing your anchor series.

this is such a great channel...well done

Would be interesting from a soil mechanics standpoint to see the ratios of fluke area to holding power. That may tell an interesting story.

You do great work , this information you provide is invaluable to us sailors . It needs to be a thing . As you said there must be a grant or something to fund these studies ! We bought a Ultra because of your research.

Fantastic videos, I appreciate the information.

You do great work. Love it!

Thank you. This scale series has been very interesting and in ways counter intuitive. Happy to see a the new heavy M1 coming. That will be a mini scale comparison between the 17 and 45 already tested.

I have watched both this and the first video on scale with the bruce and heard you mention it in other places as well. After some thought about this, I think it makes sense that holding power does not scale with weight. Even my small 24 ft craft has chain of equal weight to the anchor or more, so weight to hold is not a real factor. With all new style anchors (anything newer than the navy) fluke size and shape are the main factors in holding. Just looking at the bruce anchors in a row on your bench, there is not 5 to one difference in size of anchor. How well the anchor grabs the seafloor and how well the seafloor sticks to itself is the larger factor. Anchors are designed with the strength (scantlings) to handle a size/weight of boat based on the weight of anchor from fisherman anchor days. As such, the ratio of weight to fluke area will increase as the anchor is expected to handle a much greater pull. So an anchor that weighs twice as much but has 150% thicker shank and fluke would have less than 70% the fluke area as the smaller one. In theory, the fluke on a heavier anchor could be just as thin as the lighter one as it got close to the edges and save weight that way but this would adversely affect tip weight and be more expensive to manufacture as well. So I guess I would group anchors by fluke area rather than weight or at least if I was comparing small to large anchors for scaling I would scale by fluke area rather than weight. Your comparison of (I think it was mantus) dinghy anchors to larger, was a good example where the dinghy anchor held really well but lacked strength (it bent), while the larger anchor did not hold as well as the weight would suggest but didn't bend. So selecting an anchor by weight for some formula of boat weight/windage does not really make sense. I do not know that fluke size is the best measure for choosing an anchor for boat size but it is perhaps better than weight. Edit: Further thoughts... I would guess that if a designer expects an anchor of twice the weight to need to be twice as strong, it will be way over engineered. It will be heavier than it should be or use thicker material than it should. On the other hand, reducing the strength of a lighter anchor based on weight might cause it to bend or fail in other ways. :)

Hiya matey love your videos and detailed tests I’m wondering if you can give any suggestions on an anchor and length of chain and recommended rope for my sigma 36 yacht it’s got a displacement of 12400lbs , based on on your reviews I’m thinking the 33lb Vulcan im just not sure on how much chain to rope I’ll need for anchoring in up to 10 meters depth any ideas would be appreciated 😊