By-the-wind-sailor

By-the-wind-sailor

Observation - By-the-wind-sailor - UK and Ireland. Description: Ovoid discs of transparent plastic with off centre sail. Found scattered and infrequent after a storm and westerly winds on one beach only. Picture 3 is a microphoto and shows the concentric ridges, they look man-made. Picture 4 shows both 'hands' one

Ovoid discs of transparent plastic with off centre sail. Found scattered and infrequent after a storm and westerly winds on one beach only.
Picture 3 is a microphoto and shows the concentric ridges, they look man-made.
Picture 4 shows both 'hands' one with the fin NE - SW, the other NW - SE. Each should occur on different beaches or ends of one bay, owing to the way they tack.
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