Direction Finding (DF) System Upgrade Tender, USA - 123993223

Procurement Summary

Country: USA

Summary: Direction Finding (DF) System Upgrade

Deadline: 04 Oct 2025

Other Information

Notice Type: Tender

TOT Ref.No.: 123993223

Document Ref. No.: 70Z03825IE0000007

Financier: Self Financed

Purchaser Ownership: Public

Tender Value: Refer Document

Purchaser's Detail

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Tender Details

Description

Purpose: The Coast Guard is issuing this request for information (RFI) for market research purposes to identify parties having an interest in providing upgraded Direction Finding (DF) system capabilities with the following qualifications:

• Technical resources and expertise to support second-generation COSPAS-SARSAT beacon detection requirements

• Current industry practices for wideband DF systems integration across broad spectrum requirements

• Experience with Common Avionics Architecture System (CAAS) integration for Direction Finding (DF) System Upgrades

The upgraded DF system must be capable of detecting second-generation COSPAS-SARSAT Emergency Position Indicating Radio Beacons (EPIRBs). Additionally, the system must maintain form, fit, and function compatibility with existing DF-500 systems across multiple Coast Guard aircraft platforms: MH-65E, MH-60T, HC-130J, and HC-144B.

Key Technical Challenges: Changing technologies in distress beacons has forced the Coast Guard to look for alternatives to traditional direction finding (DF) systems. Second Generation COSPAS-SARSAT beacons use a direct sequence spread spectrum (DSSS) waveform, not currently detectable by USCG aircraft DF systems. This requires more flexible receivers and wideband antenna arrays that are capable of DF across a broad spectrum of signals from 30MHz to 406.9975 MHz, including cellular frequencies for potential private ship distress scenarios where beacons may not be available.

The DF system must provide capability for the following types of missions:

International distress frequencies 121.5 MHz and 243.0 MHz Marine Radio Channel 16 Digital Selective Calling (DSC) Marine Radio Channel 70 Automatic Identification System (AIS) Search and Rescue Transmitter (SART) and Man Overboard (MOB) 161.975 MHz and 162.025 MHz COSPAS-SARSAT 406MHz First and Second-Generation Beacons Manually entered MMSIThe DF system includes the following functionalities:

AR...
Active Contract Opportunity
Notice ID : 70Z03825IE0000007
Related Notice
Department/Ind. Agency : HOMELAND SECURITY, DEPARTMENT OF
Sub-tier : US COAST GUARD
Office: AVIATION LOGISTICS CENTER (ALC)(00038)
General Information
Contract Opportunity Type: Sources Sought (Original)
Original Published Date: Aug 05, 2025 02:37 pm EDT
Original Response Date: Oct 04, 2025 04:30 pm EDT
Inactive Policy: 15 days after response date
Original Inactive Date: Oct 19, 2025
Initiative: None

Classification
Original Set Aside:
Product Service Code:
NAICS Code: 334511 - Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

Place of Performance: Elizabeth City, NC 27909 USA

Documents

 Tender Notice