It's been a busy summer so far on Candlewood Lake.  The Candlewood Lake Authority is passing on a reminder from the state about boating in Connecticut.  People buying a new or used boat mid-season must register it in their own name before use, even if the vessel has a current registration decal.   Sellers must cancel their registration with the DMV in writing within 15 days of the sale.  Besides a ticket, sellers may be viewed as still responsible for the boat under its new user.  In order to cancel a boat registration, a certified letter can be sent to the DMV Marine Vessel Section at 60 State Street in Wethersfield.  People should keep a copy in case questions come up later.