These routine and frequent regulations are established where maritime and commercial interests require them for safety of navigation. Special anchorage areas are areas in which vessels of not more than 65 feet may anchor without displaying the required lights or sound signals because they have been found to be unnecessary to maintain marine safety in this environment. These special anchorage areas are limited geographically, and, depending on the purpose of the designation, establish both long- and short-term anchorages. Anchorage grounds are limited geographically, delineate the types and size of vessel that may use the anchorage, and may place time and other restrictions on use of the anchorage. Regulations designating special anchorage areas and anchorage grounds are promulgated by District Commanders in response to requests from appropriate officials. These routine and frequent rulemakings support the Coast Guard's broad role and responsibility of maritime safety. Approximately 12 actions are expected annually. The Coast Guard also removes or modifies anchorages as needed.