The Naval Air Warfare Center Aircraft Division in Lakehurst, NJ plans a sole-source, fixed-price modification to an existing IDIQ contract with Tel-Instrument Electronics Corp. for Link 4 Implementation. The procurement is justified under FAR 6.302-1, citing only one responsible source. Responses to this pre-solicitation notice will be considered within 15 days of publication, though no competitive solicitation will be issued. No budget amount is specified. Performance location is Lakehurst, NJ.