APPENDIX G: SEAPORTS DATA FROM
DEFENSE MAPPING AGENCY'S WORLD PORT INDEX (DMA 1992a)
EXPLANATION OF DATA COLUMNS
In the data listing for each port, the letter "Y" indicates Yes and "N" No; where there is a blank, no information is available,
By tabulation and codification, specific information for each port is confined to a single line. The data is listed under the
column headings described below:
INDEX NUMBER--Each port and place listed in the text of this publication is numbered consecutively. Ports and places
can be located by referring to the alphabetical index to find the index number. The page number will not be listed. In cases where
there is an alternate and/or more familiar name, that name will have the same index number. However, only the approved
name will appear in the text.
PORTS--Ports are grouped according to country and locality, and are listed in geographic sequence as shown on the
chartlets in the fore part of the volume, following, in general, the coastal trend. The listing of ports in off-lying islands normally
interrupts the coastal listing at some convenient place abreast of the island. River ports are listed toward the head of navigation,
alternating from bank to bank, except where local considerations make other arrangements more practicable.
In general, ports are listed under the names approved by the U.S. Board on Geographic Names. Alternate or more familiar
names, however, are also included in the index, under the same index number.
LATITUDE AND LONGITUDE--The position of each port, expressed in degrees and minutes, is generally obtained from
the best-scale chart available.
SAILING DIRECTIONS--The publication number of the Defense Mapping Agency Hydrographic/Topographic Center
Sailing Directions, describing the port or area in which the port is located, is normally given. For ports in other areas, however,
other publications are shown under the following abbreviations:
USCP--United States Coast Pilot, published by the National Ocean Service, NOAA, Department of Commerce, for
United States continental and territorial ports, including the Canadian Ports on the Great Lakes.
SCOR--Small Craft Guide, Ottawa River, published by the Canadian Hydrographic Service.
GLVI--Great Lakes Sailing Directions, Volume 1, published by the Canadian Hydrographic Service, covers the St.
Lawrence River from Montreal to Lake Ontario, the waters of Lake Ontario, Lake Erie, Lake St. Clair and the connecting
waterways including the Welland Canal, Detroit River and the St. Clair River.
PAC--Pilot of Arctic Canada, Volumes 1, 11 and 111, published by the Canadian Hydrographic Service, covers coasts
and adjacent sea areas of the Canadian eastern and western arctic, northward of Hudson Bay.
BA--Black Sea Pilot, published by the Hydrographic Department of the British Admiralty for ports in the Black Sea.
CHARTS--The number of the best-scale chart issued by the Defense Mapping Agency Hydrographic/Topographic Center
is listed with no prefix. In some cases, foreign charts are listed when this Center does not provide coverage. These charts can
be obtained from the Hydrographic departments or services of the countries concerned or their authorized agents.
SIZE--The classification of port size is based on several applicable factors, including area, facilities, and wharf space. It is
not based on area alone or on any other single factor.
TYPE HARBOR--The term "harbor" is used for the principal water area of the port. Harbors are classified as being coastal
natural, coastal breakwater, open roadstead, etc. Typical harbor types are illustrated in the forepart of this volume.
SHELTER AFFORDED--The shelter afforded from wind, sea, and swell refers to the area where normal port operations
are conducted, usually the wharf area. Shelter afforded the anchorage area is given for ports where cargo is handled by lighters,
ENTRANCE RESTRICTIONS--Natural factors restricting the entrance of vessels, such as ice, heavy swell, etc., are listed.
OVERHEAD LIMITATIONS--This entry is shown only to indicate that bridge and overhead power cables exist. It is
advisable to refer to the chart for particulars.
DEPTHS--Depth information generalized into 5 foot units, equivalents in meters, is given for the main channel, the main
anchorage, and the principal cargo pier and/or oil terminal. Depths refer to chart datum.
Depths are given in increments of 5 feet in order to lessen the number of changes when a small change in depth occurs.
A depth of 31 feet would use letter "K", a depth of 36 feet would use "J", etc. The letter "K" means a least depth of 31 feet
or greater but not as great as 36 feet.
Channel (controlling)--The controlling depth of the principal or deepest channel at chart datum is given. The channel
selected should lead up to the anchorage if within the harbor or to the wharf/pier. If the channel depth decreases from the
anchorage to the wharf/pier and cargo can be worked at the anchorage, then the depth leading to the anchorage is taken.
Anchorage--The depth in the anchorage is the least depth in the best or principal anchorage. The depth listed reflects
a general depth in the anchorage rather than an isolated shoal spot. A shoal which does not necessarily obstruct the anchorage
is not considered for the least depth if the rest of the anchorage is safe and practicable.
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