Specifications include, but are not limited to: he DNR is seeking to purchase Trimble R12 Model 60 with Radio, Trimble R12 Configuration Level R12 Base and Rover Mode, and Trimble Access Software Maintenance Plan or a State of Iowa approved equivalents. The Trimble models and options are intended to illustrate the general characteristics of geospatial GNSS equipment needed and not meant to limit competition. All equivalents must provide detailed specifications with their quote. The DNR reserves the right to determine if the equivalents are acceptable. Vendors must be authorized manufacture representatives authorized to extend manufactures warranties. Must be compatible ready to be used with Trimble TSC 3 Controller, Trimble R4, Trimble R6, and Sea Floor Systems Single Beam Sonar Hydrolite.