; (B) Vehicle and Dismount Exploitation Radars (VADER); (C) 3-dimensional, seismic acoustic detection and ranging border tunneling detection technology; (D) sensors; (E) unmanned cameras; and (F) man-portable and mobile vehicle-mounted unmanned aerial vehicles. (e) Definitions In this section: (1) High traffic areas The term high traffic areas means sectors along the northern, southern, or coastal border that— (A) are within the responsibility of U.S. Customs and Border Protection; and (B) have significant unlawful cross-border activity. (2) Situational awareness The term situational awareness has the meaning given the term in section 1092(a)(7) of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328 ). . 103. Air and marine operations flight hours (a) Increased flight hours The Secretary of Homeland Security shall ensure that not fewer than 95,000 annual flight hours are carried out by Air and Marine Operations of U.S. Customs and Border Protection. (b) Unmanned aerial system The Secretary of Homeland Security shall ensure that Air and Marine Operations operate unmanned aerial systems for not less than 24 hours per day for five days per week. (c) Contract air support authorization The Commissioner shall contract for the unfulfilled identified air support mission critical hours, as identified by the Chief of the U.S. Border Patrol. (d) Primary mission The Commissioner shall ensure that— (1) the primary mission for Air and Marine Operations is to directly support U.S. Border Patrol activities along the southern border; and (2) the Executive Associate Commissioner of Air and Marine Operations assigns the greatest priority to support missions established by the Commissioner to carry out the requirements under this Act. (e) High-demand flight hour requirements In accordance with subsection (c), the Commissioner shall ensure that U.S. Border Patrol Sector Chiefs— (1) identify critical flight hour requirements