Maine and New hampshire – Portsmouth Harbor

This coastal survey was made in Washington D.C. in October,1944 by the U.S.Coast and Geodetic Survey. Portsmouth Harbor along the Maine and New Hampshire Coasts is illustrated on this map.Details include depth readings, major roads and important cities along the coast,identification of prohibited and restricted areas where appropriate, cable areas, the locations of radio beacons, and a table to show the variation of the tide. Other Details include: Date of Issue and most recent corrections hand stamped on map Notes on the map read Caution Improved Channels- The side limits of the improvement are shown by broken lines. The controlling depth through the channel, on the date given, is placed in or alongside the channel, or in a seperate note, but no depth greater than the project depth is given. Because of possible shoaling, particularly at the edges, it must not be inferred that the depth stated exsisted throughout the entire width of the improvement on the date of the examination unless so stated, or that it has not since decreased in places across the entire width. Defensive Sea Area The Waters within the indicated limits o this chart are part of a Defensive Sea Area. Unless proceeding under United States naval supervision, vessels shall not be navigated in this area except during daylight under conditions of good visibility, and then only by specific permission. Vessels opperating under United States Naval orUnited States Coast Guard routing instructions or licenses are considered to be opperating under United States naval supervision.

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