# SAM #N00421-26-RFPREQ-TW00000-1864

Sole-source Sierra Nevada Corporation upgrade of the AN/SPN-35E Precision Approach Radar

**Buyer:** Naval Center for Advanced Computing and Data (NAWCAD)
**Posted:** October 27, 2026
**Respond By:** November 12, 2026
**Identifier:** N00421-26-RFPREQ-TW00000-1864
**NAICS:** 541330, 334511, 336413

The Department of the Navy is planning a sole-source upgrade of the AN/SPN-35E Precision Approach Radar landing system for naval air traffic control operations.
- **Government buyer:** Department of the Navy; Naval Air Warfare Center Aircraft Division (NAWCAD), Webster Outlying Field (WOLF); Air Traffic Control and Landing Systems Division.
- **OEM and named vendor:** **Sierra Nevada Corporation (SNC)**, identified as the sole-source contractor for the upgrade.
- **Requested services:** Upgrade the PAR AN/SPN-35E Landing System Upgrade Program, including project management; systems, hardware, and software engineering; integration and testing; Engineering Development Modules (EDMs); qualification testing and analysis; and logistics.
  - Related work includes fabrication, modification, repair, replacement, and upgrades to Air Traffic Control and Landing Systems components and assemblies.
- **Products, quantities, and part numbers:** No separately listed product line items, quantities, or part numbers are provided; AN/SPN-35E identifies the radar system being upgraded.
- **Notable requirements:** Work is anticipated to be performed entirely at the contractor’s site. The notice describes a sole-source task order and does not identify a subscription or option years.

### Description

<p>The NAWCAD WOLF Air Traffic Control and Landing Systems (ATC&amp;LS) Division, operating under the oLSI&reg; model, is the In-Service Engineering Activity (ISEA) for all U.S. Navy ATC&amp;LS. The ATC&amp;LS Division has a requirement to upgrade the Precision Approach Radar (PAR) AN/SPN-35E Landing System Upgrade Program (LSUP). The ATC&amp;LS Division, operating under the oLSI&reg; model, has requirements for project management, systems engineering, hardware engineering, software engineering, integration and test, Engineering Development Modules (EDMs), qualification testing and analysis, and logistics for the PAR AN/SPN-35E LSUP upgrade. This task order will have CPFF Completion CLINSs only. The requirement includes:</p>

<ul>
	<li>Anticipated Period of Performance: May 2027 &ndash; May 2032</li>
	<li>Anticipated Place of Performance: 100% of work will be performed at Contractor site.</li>
</ul>

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