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maps
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1.
Coast Survey Sketch J No. 3 Showing the Progress of the Survey of Washington Sound and Vicinity
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This black and white, antique coastal survey was made for the United States Coast Survey. The surveys provide depth readings and notes on important coastal characteristics of the area mapped. The names of harbors, rivers, islands, channels, shoals, capes, inlets, and coastal towns are identified on the map. These charts show areas that have likely undergone significant changes due to modifications and recessions of coastal lands, making them fascinating to anyone interested in local geography and history. Sold folded as issued.
Date: 1855
Price:
$50.00
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2.
"Antique Coastal Survey- Pacific Coast, San Francisco to Koos Bay"
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This black and white, antique coastal survey was made for the United States Coast Survey. The surveys provide notes on important characteristics of the area mapped. The names of harbors, rivers and coastal towns are identified on this map. These charts show areas that have likely undergone significant changes due to modifications and recessions of coastal lands, making them fascinating to anyone interested in local geography and history. This coastal survey, produced in 1887, shows the California coast from San Francisco to Koos Bay with numbered boxes around important areas for use in an index. Some margins are small due to the way the survey was bound.
Date: 1887
Price:
$45.00
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3.
"Antique Coastal Survey- Reconnaissance of the Harbors of Santa Cruz, San Simeon, Coxo and San Luis Obispo"
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This black and white, antique coastal survey was made for the United States Coast Survey. The surveys provide depth readings and notes on important characteristics of the area mapped. The names of harbors, rivers, important buildings and coastal towns are identified on the map. These charts show areas that have likely undergone significant changes due to modifications and recessions of coastal lands, making them fascinating to anyone interested in local geography and history. This coastal survey, produced in 1852, shows the harbors of Santa Cruz, San Simeon, Coxo and San Luis Obispo. Some margins are small due to the way the survey was bound.
Date: 1852
Price:
$55.00
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4.
"Maine,New Hampshire- Portsmouth to Dover and Exeter"
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This coastal survey was made in Washington D.C. in August,1944 by the U.S. Coast and Geodetic Survey. Portsmouth to Dover and Exeter along the Main 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.
Warning:
Aids to navigation may be altered, interrupted or removed without notice. In general, temporary changes due to war conditions are not incorporated on the chart.
Date: 1944
Price:
$45.00
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5.
"New York, New Jersey- Hudson River, Fort Washington Point to Yonkers"
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This coastal survey was made in Washington D.C. in May, 1944 by the U.S. Coast and Geodetic Survey department.The Hudson River between Fort Washington and Yonkers and the land surrounding (the coasts of New York and New Jersey) are 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 -
WARNING: Aids to navigation may be altered, interrupted or removed without notice. In general, temporary changes due to war conditions are not incorporated in the chart.
Date: 1944
Price:
$50.00
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6.
"Pennsylvania, New Jersey- Philadelphia and Camden Waterfronts"
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This coastal survey was made in Washington D.C. in February, 1945 by the U.S. Coast and Geodetic Survey department.The Delaware River between Wilmington and Philadelphia along the coast of New Jersey, Delaware, and New Jersey 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.
Date: 1944
Price:
$60.00
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7.
"Special Preliminary Chart-Maryland-Chesapeake Bay, Bloodsworth Inlet and Approaches"
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This restricted coastal survey was made in Washington D.C. on June 27, 1944 by the U.S.Coast and Geodetic Survey department. Chesapeake Bay in Maryland, including Bloodsworth Inlet and approaches, is illustrated on this map. Details include the names of creeks and rivers, depth readings, bridges, important buildings along the coast,railroads, cable areas, and the names of some cities.
Most recent corrections, buoys, beacons, and lights are hand stamped on the map
Notes on the map read:
Warning: Aids to navigation may be altered, interrupted or removed without notice. In general, temporary changes due to war conditions are not incorporated on the chart.
Date: 1944
Price:
$40.00
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8.
"Virginia- Chesapeake Bay, Cape Henry to Thimble Shoal Light"
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This coastal survey was made in Washington D.C. in 1944 by the U.S. Coast and Geodetic Survey. Chesapeake Bay, Virginia, from Cape Henry to Thimble Shoal Light is illustrated on this map. Details include depth readings,prohibited and restricted areas where appropriate, an examination anchorage, anchorage zones, cable areas, lights, buoys, radio beacons ( stamped on map), and the names of important cities and waterways along the coast.
The most recent corrections are hand stamped on the map.
Notes on the map read:
Warning: Aids to navigation may be altered, interrupted or removed without notice. In general, temporary changes due to war conditions are not incorporated on the chart.
Caution:
Temporary changes affecting Lights, Buoys and Day Beacons
Aids which have been destroyed or removed, but which will be reestablished and are temporarily replaced by aids of different characteristics, are indicated in color by the following abbreviations.
D Destroyed, to be reestablished
TRB Temporarily replaced by a red buoy
TBB Temporarily replaced by a black buoy
TFB Temporarily replaced by a fixed white light buoy
TFRB Temporarily replaced by a fixed red light buoy
TFLB Temporarily replaced by a flashing white light buoy
TFLRB Temporarily replaced by a flashing red light buoy
Date: 1944
Price:
$45.00
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9.
"Virginia- Hampton Roads, with anchorage chart"
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This restricted coastal survey was made in Washington D.C. in December of 1944 by the U.S. Navy Hydrographic department. Hampton Roads in Virginia is illustrated on this map, the vessels permitted to anchor in specific areas are identified. Details include the names of important cities and towns, major buildings on the coast, railroads, depth readings, prohibited and restricted areas where appropriate, some topography lines, cable areas, and red sectors.
Most recent corrections are stamped on map.
Notes on map read:
Warning:
Aids to navigation may be altered, interrupted or removed without notice. In general, temporary changes due to war conditions are not incorporated on the chart.
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.
Date: 1944
Price:
$55.00
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10.
(Upper Sheet) U.S. Coast Survey - Sketch A Showing the Progress of the Survey in Section No. I - 1862
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This black and white, antique coastal survey was made for the United States Coast Survey. The surveys provide depth readings and notes on important coastal characteristics of the area mapped. The names of harbors, rivers, islands, light houses, channels, shoals, capes, inlets, and coastal towns are identified on the map. These charts show areas that have likely undergone significant changes due to modifications and recessions of coastal lands, making them fascinating to anyone interested in local geography and history. Note: Age toning around the folds in these maps is quite common. Map is sold folded as issued.
Date: 1862
Price:
$40.00
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11.
(Upper Sheet) U.S. Coast Survey - Sketch A Showing the Progress of the Survey in Section No. I - 1864
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This black and white, antique coastal survey was made for the United States Coast Survey. The surveys provide depth readings and notes on important coastal characteristics of the area mapped. The names of harbors, rivers, islands, light houses, channels, shoals, capes, inlets, and coastal towns are identified on the map. These charts show areas that have likely undergone significant changes due to modifications and recessions of coastal lands, making them fascinating to anyone interested in local geography and history. Note: Age toning around the folds in these maps is quite common. Map is sold folded as issued.
Date: 1864
Price:
$40.00
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12.
A Chart of the Island of St. Mary and the Channel Between it and Madagascar
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1944
Price:
$50.00
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13.
Accompaning Report 6 Commisson on Navy Yards and Naval Stations - Navy Yard South of Cape Hatteras Plan Showing Proposed Development Pensacola
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This black and white, antique coastal survey was made for the United States Coast Survey. The surveys provide depth readings and notes on important coastal characteristics of the area mapped. The names of harbors, rivers, islands, channels, shoals, capes, inlets, and coastal towns are identified on the map. These charts show areas that have likely undergone significant changes due to modifications and recessions of coastal lands, making them fascinating to anyone interested in local geography and history.
Date: 1918
Price:
$55.00
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14.
acs Coast Survey Reconnaissance of Doboy Bar and Inlet Georgia
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This black and white, antique coastal survey was made for the United States Coast Survey. The surveys provide depth readings and notes on important coastal characteristics of the area mapped. The names of harbors, rivers, islands, channels, shoals, capes, inlets, and coastal towns are identified on the map. These charts show areas that have likely undergone significant changes due to modifications and recessions of coastal lands, making them fascinating to anyone interested in local geography and history. Sold folded as issued.
Date: 1855
Price:
$40.00
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15.
acs U.S. Coast Survey Sketch Illustrating the Nantucket Arc of Meridian and Adjustment of the Triangulation of Long Island Sound massachusetts
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This black and white, antique coastal survey was made for the United States Coast Survey. The surveys provide depth readings and notes on important coastal characteristics of the area mapped. The names of harbors, rivers, islands, channels, shoals, capes, inlets, and coastal towns are identified on the map. These charts show areas that have likely undergone significant changes due to modifications and recessions of coastal lands, making them fascinating to anyone interested in local geography and history. Sold folded as issued.
Date: 1868
Price:
$45.00
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16.
Acul Bay
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This coastal survey was printed in December 1935 by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details included are lighthouses and bouy positions.
Date: 1935
Price:
$50.00
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17.
Africa (Mozambique) - East Coast of Africa - Inhambane (Innamban) Bay to Port (Durban) Natal
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1944
Price:
$50.00
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18.
Africa (Mozambique) - East Coast of Africa - Mozambique Harbor to Inhambane Bay
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1944
Price:
$50.00
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19.
Africa (Mozambique) - Pungue River - Beira Harbour - Port of Beira
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1944
Price:
$50.00
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20.
Africa (Somalia) - Delagoa Bay to Cape Guardafui - Including Mozambique Channel and Madagascar I. with the off-lying Islands and Reefs
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1944
Price:
$50.00
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21.
Africa (Tanzania) - Chale Pt to Pangani - Including the Island of Pemba
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1944
Price:
$50.00
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22.
Africa (Tanzania) - Channels Between Kilwa Pt and North Mafia Channel
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1944
Price:
$50.00
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23.
Africa (Tanzania) - Pangani to Ras Kimbiji - Including the approaches to Zanzibar
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1943
Price:
$50.00
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24.
Africa (Tanzania) - West Coast of Pemba Island - Including Ports Kiuyu, George, and Cockburn, and Chaki Chaki Bay - Msuka Bay
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1943
Price:
$50.00
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25.
Africa (Tanzania)- Dar Es Salaam - Anchorages and Harbour
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1944
Price:
$55.00
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26.
Africa - Baia Di Anfila
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1945
Price:
$50.00
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27.
Africa - East Coast, Mozambique or Portuguese East Africa, Mozambique Harbor (porto de mocambique)
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1940
Price:
$50.00
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28.
Africa - East Coast, Zanzibar Island, Approaches to Zanzibar Harbor
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1944
Price:
$50.00
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29.
Africa - Italian Somaliland - Baia Di Chisimaio (Kisimayu)
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1944
Price:
$55.00
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30.
Africa - Kiswere Harbor (United Republic of Tanzania)
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1937
Price:
$50.00
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31.
Africa - Lindi River and Harbour
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1941
Price:
$50.00
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32.
Africa - Mozambique - Delagoa Bay (Lourenco Marques Port)
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1943
Price:
$50.00
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33.
Africa - Plans on the East Coast of Africa - Obiat, Illig, Warsheik, Merka, Bandar Alula, Brava and Athelet Anchorages - Mogadishu
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1940
Price:
$50.00
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34.
Africa - Red Sea - Anfila (Hanfela) Bay
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1941
Price:
$50.00
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35.
Africa - South Coast, Cape Colony - Angola Bay, Port Elizabeth
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This coastal survey was printed in August, 1944 by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details included are lighthouses and bouy positions.
Date: 1944
Price:
$50.00
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36.
Africa - South East Coast, Durban (Port Natal)
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1944
Price:
$50.00
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37.
Africa - Southwest Coast of Pemba Island - Mchengangazi Passage
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1943
Price:
$50.00
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38.
Alaska - Aleutian Islands - Harbors and Anchorages - Andreanof Islands (Adak Island: Shagak Bay / Chapel Roads and Chapel Cove / Three Arm Bay, Tanaga Island: Hot Springs Bay, Kanaga Island: Kanaga Bay)
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1947
Price:
$55.00
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39.
Alaska - Aleutian Islands - Unimak and Akutan Passes and Approaches
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1942
Price:
$50.00
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40.
Alaska - Aleutian Islands - Unimak and Akutan Passes and Approaches
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1936
Price:
$55.00
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41.
Alaska - South Coast - Iliamna Bay - Cook Inlet
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1946
Price:
$50.00
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42.
Alaska - South Coast - Kenai Peninsula - Cape Resurrection to Two Arm Bay - Seward
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1969
Price:
$75.00
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43.
Alaska - South Coast - Morzhovoi Bay and Isanotski Strait
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1942
Price:
$50.00
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44.
Alaska - South Coast - Yukatat Bay / Harbor
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1968
Price:
$75.00
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45.
Alaska - Southeast Coast - Harbor Charts - Clarence Strait and Behm Channel - Ratz Harbor - Tolstoi and Thorne Bays - Naha Bay - Dewey Anchorage - Union Bay
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1972
Price:
$75.00
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46.
Alaska - West Coast - Bering Sea (Eastern Part)
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This coastal survey was printed by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details that maybe included are lighthouses and buoy positions.
Date: 1941
Price:
$60.00
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47.
Alaska and Adjacent Waters - Isogonic Chart (Magnetic Declination) for the Epoch 1890
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This black and white, antique coastal survey was made for the United States Coast Survey. The surveys provide depth readings and notes on important coastal characteristics of the area mapped. The names of harbors, rivers, islands, light houses, channels, shoals, capes, inlets, and coastal towns are identified on the map. These charts show areas that have likely undergone significant changes due to modifications and recessions of coastal lands, making them fascinating to anyone interested in local geography and history. Note: Age toning around the folds in these maps is quite common. Map is sold folded as issued.
Date: 1890
Price:
$40.00
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48.
Alaska Penninsula and part of the Aleutian Islands - Diagram of the Range of the Tides, Iliuliuk Harbor, Unalashka
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This black and white, antique coastal survey was made for the United States Coast Survey. The surveys provide depth readings and notes on important coastal characteristics of the area mapped. The names of harbors, rivers, islands, light houses, channels, shoals, capes, inlets, and coastal towns are identified on the map. These charts show areas that have likely undergone significant changes due to modifications and recessions of coastal lands, making them fascinating to anyone interested in local geography and history. Note: Age toning around the folds in these maps is quite common. Map is sold folded as issued.
Date: 1872
Price:
$45.00
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49.
Alden's Rock, Portland
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This black and white, antique coastal survey was made for the United States Coast Survey. The surveys provide depth readings and notes on important coastal characteristics of the area mapped. The names of harbors, rivers, islands, channels, shoals, capes, inlets, and coastal towns are identified on the map. These charts show areas that have likely undergone significant changes due to modifications and recessions of coastal lands, making them fascinating to anyone interested in local geography and history. Sold folded as issued.
Date: 1853
Price:
$45.00
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50.
Algoa Bay
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This coastal survey was made in February 1943 by the U.S. Navy Hydrographic Office in Washington D.C. Details include the names of cities and waterways along the coast. Depth soundings are shown in fathoms. Other details included are lighthouses and bouy positions.
Date: 1943
Price:
$50.00
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On
February 10, 1807 President Thomas Jefferson signed a bill creating
the United States Coast Survey. The new agency was responsible for
conducting detailed surveys of the young nation’s coastal areas
and producing charts based on this work. Its creation followed a
realization of the urgent need to ensure the safety of mariners,
ships, and cargoes by supplying information about the shoals, reefs,
and navigational hazards among which they moved while carrying the
nation’s commerce. Because of this concern for maritime trade, the
Survey was established under Albert Gallatin, Secretary of Commerce,
who in turn selected a young Swiss engineer, Ferdinand Hassler,
then employed as a mathematics teacher at West Point, to head the
new agency. As the U.S. Coast survey was delayed by the war and
by difficulties in obtaining adequate surveying instruments, actual
surveying of the coasts did not get underway until 1816, when Hassler
began his work on the New York triangulation network. This selection
was to have a profound effect on the course of the Survey's work.
Hassler
was a perfectionist who envisioned the division of the Survey's
work into three branches-geodetic, hydrographic, and topographic,
of which the geodetic was most important. Geodesy is the science
concerned with the measurement and description of the size and shape
of the earth, and includes large-scale surveys for determining positions
and elevations of points for which the size and shape of the earth
must be taken into account. The original conception of the Survey
was much less ambitious and did not include geodetic work, but Hassler
rightly saw that the Survey's work would prove truly useful and
would stand the test of time only if its detailed triangulation
could be attached to a firm framework of geodetically determined
points. This insistence caused lengthy delays in the work of the
Survey and endless political problems with a Congress bent on more
immediate, less precise results, but it ultimately was the basis
for the extremely accurate maps and charts the Survey produced.