Key:seamark:restricted_area:category

Categories of restricted area

Restricted areas (CATREA)

Category	seamark:restricted_area:category	Definition
Offshore safety zone	safety	The area around an offshore installation within which vessels are prohibited from entering without permission.
Nature reserve	nature_reserve	A tract of land managed so as to preserve it's flora, fauna, physical features, etc.
Bird sanctuary	bird_sanctuary	A place where birds are bred and protected.
Game reserve	game_reserve	A place where wild animals or birds hunted for sport or food are kept undisturbed for private use.
Seal sanctuary	seal_sanctuary	A place where seals are protected.
Degaussing range	degaussing_range	An area, usually about two cables diameter, within which ships' magnetic fields may be measured sensing instruments and cables are installed on the sea bed in the range and there are cables leading from the range to a control position ashore.
Military area	military	An area controlled by the military in which restrictions may apply.
Historic wreck area	historic_wreck	An area around certain wrecks of historical importance to protect the wrecks from unauthorized interference by diving, salvage or deposition (including anchoring).
Navigational aid safety zone	navigational_aid_safety	An area around a navigational aid which vessels are prohibited from entering.
Minefield	minefield	An area laid and maintained with explosive mines for defence or practice purposes.
Swimming area	swimming	An area in which people may swim and therefore vessel movement may be restricted.
Waiting area	waiting	An area reserved for vessels waiting to enter a harbour.
Research area	research	An area where marine research takes place.
Dredging area	dredging	An area where dredging is taking place.
Fish sanctuary	fish_sanctuary	A place where fish are protected.
Ecological reserve	ecological_reserve	A tract of land managed so as to preserve the relation of plants and living creatures to each other and to their surroundings.
No wake area	no_wake	An area in which a vessels' speed must be reduced in order to reduce the size of the wake it produces.
swinging area	swinging	An area where vessels turn.
Water skiing area	water_skiing	An area within which people may water ski and therefore vessel movement may be restricted.
Environmentally Sensitive Sea Area (ESSA)	essa	A generic term which may be used to describe a wide range of areas, considered sensitive for a variety of environmental reasons.
Particularly Sensitive Sea Area (PSSA)	pssa	An area that needs special protection through action by IMO because of its significance for regional ecological, socio-economic or scientific reasons and because it may be vulnerable to damage by international shipping activities.