Kystverket's total need in the framework agreement period is estimated to approx. 30 of which approx. 12 shall be visibility gauges and approx. 18 shall be wind gauges. Kystverket will hold call-offs on the contract for 4 wind gauges and 5 visibility gauges and the accompanying equipment to be continually delivered, see annex 5 in the tender documents that describes the placement of the visibility and wind gauges. The delivery, installation and commissioning shall occur immediately after the contract has been signed, and 30 days after Kystverket's order at the latest.