[GPSNavX]

Screen shot revealed that the Portsmouth to Cape Ann - US4MA04M (approach 1:80,000) cell was properly displayed providing coverage for Gloucester harbor at 42*35.84N - 070*40.12W. NOAA has not yet created a harbor detail cell for the Portsmouth harbor. Recommendation is to supplement NOAA ENCs with either Maptech or NOAA raster charts. In this case Gloucester Harbor (13281_1) would provide raster coverage for this area.