Well here is th response I got back from the Marine Patrol.
Quote:
Sir/Ms,
The light buoys and the signage, is normally removed from all lakes on Columbus Day. This is dependent on weather, it may be after that date by a few days. As for the installation in the Spring, all the navigational aids State wide are to be installed by Memorial Day.
Dispatcher Beach
NH Marine Patrol
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It appears the use Columbus day as the marker in the fall, and Memorial Day in the Spring. Of course they always seemed to have the ATONs in before Memorial Day. Now that doesn't mean one has to agree with and be alright with this, but this is the Plan of Record for the Marine Patrol. Personally I think it should be the end of Oct. but I suppose in the grand scheme of things what is a few weeks.....