Historical Map and Chart Collection
From the Office of Coast Survey, includes NH Historical nautical charts.
National Ocean Service
Access to online nautical charts.
Online Chart Viewer - NOAA Charts for U.S. Waters
Updated weekly, this provides access to over 1000 nautical charts.
New Hampshire Nautical Charts
From the Office of Coast Survey, allows you to search the interactive map for NH charts.
Sea-Tow Nautical Charts
Current nautical charts put online in cooperation with NOAA.