The charts are available in two resolutions, 1:100,000 and 1:250,000. Since it is confusing to show both on a graphic, they are displayed separately on two different graphics. Note that some areas are not well covered. Whole CDs are $25 each and can be ordered with the program or separately.
Below is a graphic showing the location and size of the 1:100,000 charts available.

Below is a graphic showing the size and location of the 1:250,000 charts.

Below are the contents of the SoftChart International
Product ... Bathymetric Region 1A CD
Canadian Border to Block Island, RI
29 Charts
67.3 MB
v.1.2
Chart Scale Name
--------------------------------------------------------------------------------
N100 1:100,000 Bridgeport
N101 1:100,000 Provincetown
N102 1:100,000 Chatham
N103 1:100,000 Siasconset
N65 1:100,000 Machias
N66 1:100,000 Bangor
N67 1:100,000 Petit Manan Port
N68 1:100,000 Bar Harbor
N69 1:100,000 Augusta
N70 1:100,000 Matinicus
N71 1:100,000 Bath
N72 1:100,000 Portland
N73 1:100,000 Kittery
N74 1:100,000 Gloucester
N99 1:100,000 New Haven
NNK18_9 1:250,000 Hartford
NNK19_1 1:250,000 Portland
NNK19_2 1:250,000 Bath
NNK19_3 1:250,000 Jordan Basin
NNK19_4 1:250,000 Boston
NNK19_5 1:250,000 Cashe's Ledge
NNK19_6 1:250,000 Browns Bank
NNK19_7 1:250,000 Providence
NNK19_8 1:250,000 Chatham
NNK19_9 1:250,000 Corsair Canyon
NNK20_4 1:250,000 Baccaro Bank
NNK20_7 1:250,000 Fundian Rise
NNL19_11 1:250,000 Bangor
NNL19_12 1:250,000 Eastport