The map shows the location of known Annex I submarine structures made by leaking gases. It also shows areas where gas seeps are known to occur and therefore where there may be additional submarine stuctures that have not yet been found. Through offshore survey, JNCC is working to confirm the presence of Annex I submarine structures in these areas and to identify those sites which merit selection as SACs. For information on the identification of SACs for submarine structures made by leaking gases within 12 nautical miles of the coast, please contact the relevant country conservation agency.