Ice sleds perhaps ?
I can't say for sure but looking at the slant of the sails I'm reminded of a windsurfer. Could these have been windsurfer based ice sleds ? Has anyone seen them on Winni ?
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Mee'n'Mac
"Never attribute to malice that which can be explained by simple stupidity or ignorance. The latter are a lot more common than the former." - RAH
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