; (B) Vehicle and Dismount Exploitation Radars (VADER); (C) 3-dimensional, seismic acoustic detection and ranging border tunneling detection technology; (D) sensors; (E) unmanned cameras; (F) man-portable and mobile vehicle-mounted unmanned aerial vehicles; and (G) any other devices, tools, or systems found to be more effective or advanced than those specified in subparagraphs (A) through (F). . 212. Comprehensive southern border strategy (a) Requirement Not later than one year after the date of the enactment of this Act, the Secretary shall submit to the Committee on Homeland Security of the House of Representatives and the Committee on Homeland Security and Governmental Affairs of the Senate a comprehensive southern border strategy. (b) Contents The strategy submitted under subsection (a) shall include— (1) a list of known physical barriers, levees, technologies, tools, and other devices that can be used to achieve and maintain situational awareness and operational control along the southern border; (2) a projected per mile cost estimate for each physical barrier, levee, technology, tool, and other device included on the list required under paragraph (1); (3) a detailed account of which type of physical barrier, levee, technology, tool, or other device the Department of Homeland Security believes is necessary to achieve and maintain situational awareness and operational control for each linear mile of the southern border; (4) an explanation for why such physical barrier, levee, technology, tool, or other device was chosen to achieve and maintain situational awareness and operational control for each linear mile of the southern border, including— (A) the methodology used to determine which type of physical barrier, levee, technology, tool, or other device was chosen for such linear mile; (B) an examination of existing manmade and natural barriers for each linear mile of the southern border; (C) the information collected and evaluated from— (i) the appropriate U.S. Customs and Border Protection Sector Chief