Spot on Carl.I have not used sleds but over the last 25 years I have seen a number of people here on the DHBP demonstrate building and floating them.
What I have seen is that the nested sleds are all connected. You attach an anchor line (with a bouy to break the current) to the first one and the rest simply slide out the back, forming a string of decoys. I believe most guys use a rear anchor line to keep them from swinging in the current.
Sorta like long-lining decoys.
View attachment 56750
Just need to add a 24" dropper from the sled to long-line and a seasoned dog will swim right through/over the line.I have used Scoter sleds and did them just as Roy did. Except I used a couple decoys in the front and and back of the long line instead of a crab pot bouy. They worked great. Alsmost looks like the birds are diving as you motor around them. I like the idea that Carl posted above but if you are using a dog they will not be abel to swim through the spread.
Sleds are silhouettes separated by two crossbars providing both stability and flotation. Sleds normally built with different widths so they stack for storage. Sleds are deployed like full body decoys, either individually or ganged together. Like everything in life, they have their benefits and drawbacks. The size of the silhouettes can be made substantially larger for the same storage space than full body decoys for greater visibility. But they have a lot of drag when deployed in water with currents, and they are less effective for bringing the waterfowl into full commitment, so they are usually deployed with a mix of full body decoys or in areas where there are lots of opportunities. Bill Wasson, active member here in the early years and a professional Maine guide stated in a published article, that he rigged his sleds on the outside edge of his rig with full bodied decoys inside. The idea being that the eiders were attracted from a distance with the large silhouettes but when they swung down wind for an approach the silhouettes faded out and the eiders would swing into the full bodies well within range of the guns. Personally I like the flexibility of having my sleds on individual 36" droppers (bridled for stability).Whats the advantage to a sled vs a long line ?