The Swamp School Launches Cloud-based Antecedent Precipitation Tool (APT) New Wetlands Delineation Tool Released February 09, 2021 09:00 ET | Source: Swamp School Swamp School ANGIER, N.C., Feb. 09, 2021 (GLOBE NEWSWIRE) -- The Swamp School LLC, the gold standard of training and certifications for government agencies and clients in the private sector seeking to advance their wetland careers, has developed a cloud-based Antecedent Precipitation Tool (APT). The new APT tool is designed to meet the requirements of the 2020 Navigable Waters Protection Rule, which updates the definition of jurisdictional waters in the U.S. A significant part of this definition requires the user to limit their wetland delineation work to typical rainfall years.