This type of testing organized by an interested party...
Regarding this testing that seems to be on an uncharacteristic hard bottom (it is not normal that all the other anchors have failed)...
... Also we can see that while the Mantus is pulled very slowly the Spade is pulled three times faster.
First of, I am the one who requested for the test to be done here in Bocas and it was my boat with me as the captain. I took the approach of this test as it was my responsibility to make sure the anchor set. I attempted to set each anchor the same way I set my anchor (more on that later). So NO, it was not an interested party. I have no vested interest how the Mantus performs but I do have a vested interest, as a cruiser, to know and inform others of what is the best anchor...aka...the reason for my request to test here as my primary anchor, the Bulwagga would "set" and hold like always but after diving on it I saw it didn't dig in like I am used to. I sent Greg a picture and asked if he thought his could do better.
Yes, I own a Mantus as a backup primary anchor but it is normally disassembled and stored. My Bulwagga is my primary because I really like it and I can't store it. That is, until Greg brought me a bracket to put it on.
Second, it may be uncharacteristic bottom for you, but not for people down here. Seems you fall into the trap many do like I used to in thinking everybody else's environment is like yours. Not so. I have been amazed at the different environments at each stop I make in my cruising.
Third, Each anchor was worked about the same as we could get. The process was: drop all anchors in the same spot...a few feet apart so they had a clean pull. Greg, the video guy would attach the chain and then let me know it was time to set it. If the wind was blowing hard enough at that time, I would instruct the helmsman to drift. If not, then I instructed to put in reverse at idle. Once the chain got tight, then I instructed the helmsman to start increasing the rpm slowly up to 2600 and then hold for 10 seconds or when I said to let off. In the case of the Spade, just like the Fortress (one of my anchors), we never got out of idle. I could tell when an anchor was dragging by the feel on the chain. I never gave the order to increase RPMs on those two.
It is true that it is not fair to test an aluminum Spade against a steal Mantus in setting but that's all we had to work with. We put out a request on the morning net and that is all we got.
The Mantus and Bulwagga performed about equal but because you can't buy a Bulwagga anymore, it is understandable that it's not part of the video. I know that the Mantus holds better due to me riding out a hurricane on each one, but I have to admit I was really impressed with the Mantus's setting ability in this stuff. I am still torn on what I think works better here in this hard stuff but one thing I am sure of, I can't go wrong with either one here or anyplace else.
Now if you doubt I am a real cruiser then you can just look up Bocas Del Toro on facebook and ask anybody on there if we did the test here and if Franklin on Dreamboat is really here. I'm not normally part of your web forum crew but I get on here to support the Mantus because I really wish everybody had a Mantus. In fact, one of the anchors we tested with I gave to another boat here so he would stop dragging. We had a small blow today and he didn't
Summary: Greg just hooked up the chain and video taped it while I tried to set it. I used the same scope, same boat, same chain and same process for every anchor. As a matter of fact, I didn't even know which anchor he was hooking up for each pull. I only found out after the pull. So no, you are wrong, it was an unbiased test.