Fairly sure the use instructions(googled them a while back) for the Anchor Buddy, are to slide it down, attached to the rode using the provision on the AB to do that, and position it just off the bottom at low tide.
Does that fit with using a catenary, I think it might be a little different in that it seeks to place weight on the rode straight down, with the rode lying virtually flat from AD to your choice of anchor. A wind loading could make it more a catenary, maybe temporarily. Must try my AB, it came with the boat.
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BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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