Site identification Information describing the agency code and site number of the site. SiteVisitExportInstructions is an XML format developed for providing instructions to export site visits from an National Water Information System (NWIS) database. The description of the boat and moter used in the measurement. The description of the boat and moter used in the measurement. The description of the boat and moter used in the measurement. The description of the boat and moter used in the measurement. The starting date and time of the site visit date/time search/retrieval range. The ending date and time of the site visit date/time search/retrieval range.