Commandant(G-ACS-1A/GAA), U.S. Coast Guard Headquarters, 2100 Second Street SW., Washington, DC 20593-0001

58 -- DIFFERENTIAL GLOBAL POSITIONING NAVIGATION SYSTEM (DGPS) RADIOBEACON REPLACEMENT SOL DTCG23-97-R-TVG001. Contact: Contracting Officer: Jerome Hensley, Ph: (202) 267-6211, Fax: (202) 267-4019; Contract Specialist: LCDR George Asseng, Ph (602) 267-6206. Firm fixed-price commercial item acquisition of 70 each, DGPS transmitters with 3 option lots of 10 each with 5 one year options for ship-in maintenance. Firm fixed-price commercial item acquisition of 2 option lots of 25 each, DGPS antenna couplers and 5 option lots of 10 each with 5 one year options for ship-in maintenance. The transmitters and couplers provide correction information to the Navstar Global Positioning System 24 hours a day throughout the United States and Puerto Rico. In order to perform this function, the general requirements of the transmitter are: 1) variable output power up to 1000 watts; 2) broadcast a signal in the frequency band of 283.5 KHz to 325.0 KHz; 3) completely redundant system; 4) capable of battery backup; and 5) provide remote control and status in accordance with the proposed Radio Technical Commission for Maritime (RTCM) recommended standards for Differential Navstar GPS reference stations and integrity monitors. The radio frequency input signal is a minimum shift keyed signal modulated at up to 200 BPS on a frequency carrier in the frequency band of 283.5 KHz to 325.0 KHz. This signal contains the DGPS corrections. The general requirements of the antenna coupler are: 1) operation on 115 Variable Alternating Current (VAC) (+/- 10%), 60 Hz (+/- 6%); 2) harmonic outputs of less than -60 dBc; 3) spurious outputs of less than -70 dBc; 4) shall be compatible with the transmitter output signal described above; 5) shall autotune to compensate for weather related changes; 6) shall be able to operate in temperatures ranging from -40 degrees centigrade to +65 degrees centigrade; 7) after exposure during storage to temperatures from -40 degrees centigrade to +70 degrees centigrade, the coupler shall meet or exceed all performance specifications when it is returned to the operating temperature range; 8) shall operate in a relative condensing humidity range from 0 to 100%; 9) shall have at a minimum an adjustable spark gap to prevent damage to the equipment from lightning transients. The above items are not all-inclusive, being only general requirements. Delivery of the first transmitter unit will be FOB destination to the U.S. Coast Guard Electronics Engineering Center, Wildwood, NJ. This unit will be delivered 30 days after contract award. The Coast Guard will take 45 days to conduct acceptance testing of the first unit. The remaining 69 units will be delivered FOB destination to the Coast Guard Engineering Logistics Center, Columbia, MD at a rate of 8 per month starting 30 days after acceptance of the first unit. The base value method of acquisition will be used. If you have already replied to our previous synopsis seeking comments on the draft specification, you need not reapply as you are already on the bidders list. Only new sources/requestors need to send a written request for the solicitation. All responsible sources may submit an offer which will be considered by the U.S. Coast Guard. The SIC Code for this acquisition is 3663. See Note 12. (250)

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