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Welcome to:

International Dictionary of Marine Aids to Navigation

also known as "The IALA Dictionary"

When using the Dictionary Search Engine you should note that:

• the search is not case-sensitive, so ATON, aton and AtoN all give the same result
  
• if you enter the word light, it will not return pages with the word lights or lighting
  
• a search will only return pages that contain all the words in your search since the search engine operates on whole words separated by spaces or punctuation marks
  
• you can search for an exact phrase using double quotes. Every term has a unique identifier (MRN) in the format urn:mrn:iala:dic:C-S-NNNN (chapter-section-number, e.g. urn:mrn:iala:dic:4-3-0045). To find a term by its number, enclose the number in double quotes, e.g. "4-3-0045". A number from the original IALA Dictionary (e.g. 4-3-045) is found by writing its last part with four digits ("4-3-0045").

IALA Dictionary 2023 Revision

• Alphabetical Index
• Thematic Index
• List of Acronyms

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International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM

Aid to Navigation

Maritime Resource Name (ENAV)

acceleration due to gravity (m/s2)

observation duration

ampere