We recently replaced all the sections of our old wooden plank removable dock boards on one of our finger docks with composite. One of the benefits of composite is it does not float so it should stay in place better should the water rise above it. It's a little heavier than wood so each section is one piece smaller than the wood section was to reduce the weight when removing for the winter.
If you ever need to replace your removable dock boards, this may be something you want to think about.
Dan
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