I have 23 Navionics chart chips for sale. Each of these charts worked in my Northstar 952 GPS/Chartplotter. I have listed below the chart number and area in the chart. They are being sold for $30 each. I will pay for shipping. If interested, please email at john.rivkin@rivkin.com.

Chart Area Chart Number
Cape Cod-Montauk US182T32
Boston-New York US674XL
Boston-New York US674XL (not a typo, another cartridge)
New York-Block Island NC/US825L
Maine US673XL
Florida US632XL
North Carolina US645XL
Chesapeake Bay US634XL
New Jersey-Delaware US637XL
NJ-Chincoteague US824L
S.Carolina-N.Florida US642XL
Upper Chesapeke US822L
South Florida US603T32
Bahamas US694XL
Mystic-Smithtown US020X08
Lake George US148X02
Hudson Rvr-NY Harbor US119X32
Massachusetts Bay US201S08
New Haven-Sandy Hook US703T32
Montreal-L.Champlain US070X08
Cape Anne & Appr US200S08
Cape Cod-Montauk US182S32
Area Unknown US120x32

Happy hunting!