The DICT Development Group

  Cross-Reference List of Hydrographic Data Codes
  
                                                                         
       IHO 23-4th:  Limits of Oceans and Seas, Special Publication 23,    
       Draft 4th Edition 1986, published by the International Hydrographic
       Bureau of the International Hydrographic Organization              
       IHO 23-3rd:  Limits of Oceans and Seas, Special Publication 23, 3rd
       Edition 1953, published by the International Hydrographic          
       Organization                                                       
       ACIC M 49-1:  Chart of Limits of Seas and Oceans, revised January  
       1958, published by the Aeronautical Chart and Information Center   
       (ACIC), United States Air Force; note - ACIC is now part of the    
       National Imagery and Mapping Agency (NIMA)                         
       DIAM 65-18:  Geopolitical Data Elements and Related Features, Data 
       Standard No. 4, Defense Intelligence Agency Manual 65-18, December 
       1994, published by the Defense Intelligence Agency                 
       The US Government has not yet adopted a standard for hydrographic  
       codes similar to the Federal Information Processing Standards      
       (FIPS) 10-4 country codes. The names and limits of the following   
       oceans and seas are not always directly comparable because of      
       differences in the customers, needs, and requirements of the       
       individual organizations. Even the number of principal water bodies
       varies from organization to organization. Factbook users, for      
       example, find the Atlantic Ocean and Pacific Ocean entries useful, 
       but none of the following standards include those oceans in their  
       entirety. Nor is there any provision for combining codes or        
       overcodes to aggregate water bodies. The recently delimited        
       Southern Ocean is not included.                                    
  
                                                                          
                             Principal Oceans and Seas of the World        
                             With Hydrographic Codes by Institution        
                      IHO 23-4th IHO 23-3rd* ACIC M 49-1     DIAM 65-18    
       Arctic Ocean   9          17          A               5A            
      Atlantic Ocean  -          -           -               -             
      North Atlantic  1          23          B               1A            
      Ocean                                                                
      South Atlantic  4          32          C               2A            
      Ocean                                                                
        Baltic Sea    2          1           B26             7B            
       Indian Ocean   5          45          F               6A            
       Mediterranean  3.1        28          B11             -             
       Sea                                                                 
       Eastern        3.1.2      28 B        -               8E            
       Mediterranean                                                       
       Western        3.1.1      28 A        -               8W            
       Mediterranean                                                       
       Pacific Ocean  -          -           -               -             
       North Pacific  7          57          D               3A            
       Ocean                                                               
       South Pacific  8          61          E               4A            
       Ocean                                                               
      South China and 6          49, 48      D18 plus others 3U plus others
      Eastern                                                              
      Archipelagic                                                         
      Seas                                                                 
          *The letters after the numbers are subdivisions, not footnotes.