This is a Request for Preproposals for a Vehicle Integrated Platform Enhanced RADIAC (VIPER) Non-GM Alternative Sensor Prototype for tracked tactical ground vehicles. The requirement will be handled through the JPEO-CBRND CWMD Broad Other Transaction Authority procedures for prototype development efforts. Interested parties should review the full BOTAA announcement and the attached request for pre-proposals, including submission requirements, before submitting. Pre-proposals must reference the specified VIPER tracked-vehicle topic.