This is a sole-source, firm-fixed-price procurement to HII Unmanned Systems Inc. for 10 SDV MK8 Hydroid Transponders and associated freight, for the Naval Surface Warfare Center Panama City Division in Panama City, FL. HII Unmanned Systems is the OEM and only approved source for the specified transponder assembly. Using an alternate brand would require approximately 6 months or more of compatibility and approval work, creating unacceptable project timeline and cost risk. The government does not expect significant savings through competition and intends to award on a sole-source basis.