The Naval Surface Warfare Center, Philadelphia Division is seeking sources to produce, fabricate, assemble, inspect, test, and deliver up to 50 Electronic Throttle Control Units and associated spare Sled Assemblies for Virginia-class submarines. The performance period is expected to span up to five years. The anticipated contract is an unrestricted, Indefinite-Delivery, Indefinite-Quantity Firm-Fixed Price type. This notice is for planning purposes only and is not a request for proposals.