; (B) aquaculture facilities; (C) marine sanctuaries designated by the Secretary of Commerce under the National Marine Sanctuaries Act ( 16 U.S.C. 1431 et seq.); (D) estuaries of national significance designated under section 320 of the Federal Water Pollution Control Act ( 33 U.S.C. 1330 ); (E) critical habitat, as defined in section 3(5) of the Endangered Species Act of 1973 ( 16 U.S.C. 1532(5) ); (F) estuarine research reserves within the National Estuarine Research Reserve System established by section 315 of the Coastal Zone Management Act of 1972 ( 16 U.S.C. 1461 ); and (G) national parks and national seashores administered by the National Park Service under the National Park Service Organic Act ( 16 U.S.C. 1 et seq.). (b) Factors considered In determining whether navigational measures are warranted for an area identified under subsection (a), the Commandant and the Under Secretary for Oceans and Atmosphere shall consider, at a minimum— (1) the frequency of transits of vessels which are required to prepare a response plan under section 311(j) of the Federal Water Pollution Control Act ( 33 U.S.C. 1321(j) ); (2) the type and quantity of oil transported as cargo or fuel; (3) the expected benefits of routing measures in reducing risks of spills; (4) the costs of such measures; (5) the safety implications of such measures