Glossary

The boundary of a marine protected area is called the perimeter. The largest perimeter, which may comprise sub-perimeters, is the main perimeter. Sub-perimeters are areas that are classified, described and mapped in the official text designating the marine protected area.

These sub-perimeters have:

• specific regulations (different from those of the main perimeter);
• and possibly specific management objectives. 

Sub-perimeters are often areas in which protection is strengthened. A marine protected area may have one or more sub-perimeters.

Please also refer to: Understanding the complementary nature of the different perimeters

Designations or categories of protected areas (whether marine or on land) are defined on a national basis. Although categories bearing the same name exist in different countries (such as national parks), they are not identical (the level of protection, management measures and governance, etc. may differ). A designation (or category) is established in a legal, formal manner and nationally recognized as such.

Please also refer to: Understanding the complementary nature of designations