; (2) $18,000,000 for marine debris assessment and removal; (3) $40,000,000 for mapping, charting, and geodesy services; and (4) $50,000,000 to improve weather forecasting, hurricane intensity forecasting and flood forecasting and mitigation capabilities, including data assimilation from ocean observing platforms and satellites: Provided , That the amount provided under this heading is designated by the Congress as being for an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985. Procurement, acquisition and construction For an additional amount for Procurement, Acquisition and Construction for necessary expenses related to the consequences of Hurricanes Harvey, Irma, and Maria, $79,232,000, to remain available until September 30, 2020, as follows: (1) $29,232,000 for repair and replacement of Federal real property and observing assets