PSC 6605

Overview

The Product Service Code system categorizes the products and services that U.S. agencies buy, enabling consistent coding in FPDS and SAM for spend tracking, analysis, and reporting. The PSC structure and updates are maintained through the PSC Manual issued on Acquisition.gov. ¹

PSC 6605 identifies “Navigational Instruments” within Federal Supply Group 66. Official inclusions are azimuth instruments, sextants, octants, compasses, plotting boards, underwater log equipment, air position indicators, and drift meters. Use this code when these instruments are the predominant items acquired. Related Group 66 classes note exclusions that help distinguish 6605 from adjacent codes. ²

See also on G2X:

• G2X — PSC 6605 overview: https://app.g2xchange.com/psc/6605
• G2X — PSC 6610 Flight Instruments: https://app.g2xchange.com/psc/6610
• G2X — PSC 5825 Radio Navigation Equipment, Except Airborne: https://app.g2xchange.com/psc/5825

What this PSC covers

• Compasses used for navigation, including marine and field types. ²
• Sextants and octants for celestial navigation. ²
• Azimuth instruments for bearing determination. ²
• Plotting boards for navigational plotting. ²
• Air position indicators and drift meters. ²
• Underwater log equipment for measuring vessel speed or distance. ²

Related NAICS and PSC codes

Type	Code	Descriptor
PSC	6610	Flight Instruments
PSC	6615	Automatic Pilot Mechanisms and Airborne Gyro Components
PSC	6650	Optical Instruments, Test Equipment, Components and Accessories
PSC	5825	Radio Navigation Equipment, Except Airborne

Coding guidance and boundaries

• Use 6605 for traditional navigational instruments (e.g., sextants, compasses) rather than flight instrumentation. The PSC Manual lists these items under 6605. ²
• Use 6610 when the requirement is for flight instruments (e.g., airspeed indicators, attitude gyros); that class explicitly excludes “Navigational Instruments (FSC 6605).” ²
• Radio-based navigation systems (e.g., LORAN, direction finders) map to 5825 or 5826 rather than 6605. ²
• Sextants and octants fall in 6605; the optical instruments class 6650 expressly excludes octants and sextants. ²

DoD coordinated acquisition note (Navy shipboard)

Under DFARS PGI coordinated acquisition assignments, the Navy has a partial assignment for 6605 limited to lifeboat and raft compasses, aircraft sextants, hand leads (soundings), lead reels, sounding machines, and pelorus stands used aboard ships assigned to the Navy for coordinated acquisition. ³

Service PSCs for lifecycle actions

• Use J066 for maintenance, repair, and rebuilding of instruments and laboratory equipment, which covers service actions on items that include the 6605 family. ²
• Use K066 for modification of instruments and laboratory equipment when the scope changes the configuration or capability of the equipment. ²

Frequently asked questions

• What does PSC 6605 include?
  It encompasses navigational instruments such as azimuth instruments, sextants, octants, compasses, plotting boards, underwater log equipment, air position indicators, and drift meters. Agencies should assign 6605 when these items are the primary deliverables rather than incidental accessories or tools. ²

• When should 6610 be used instead of 6605?
  Use 6610 for flight instruments such as airspeed, rate-of-climb, and attitude indicators. That class expressly excludes navigational instruments, which belong under 6605. Selecting the right PSC follows the exclusion notes in the PSC Manual. ²

• Where do radio navigation devices (e.g., LORAN, direction finders) fit?
  Radio-based navigation devices are classified under 5825 (except airborne) or 5826 (airborne), not under 6605. This distinction separates traditional instruments from radio-frequency navigation systems for accurate reporting. ²

• Which service PSC covers calibration or repair of navigational instruments?
  Use J066 for maintenance and repair (including calibration) of instruments and laboratory equipment. Use K066 when the effort modifies configuration or capability. These service categories are defined in the PSC Manual. ²

• Are there DoD coordinated acquisition rules affecting 6605 buys?
  Yes. DFARS PGI assigns the Navy certain shipboard 6605 items—such as lifeboat compasses and aircraft sextants—for coordinated acquisition when used aboard ships assigned to the Navy. Check the PGI listing to confirm current scope. ³

Useful resources

• Product and Service Code (PSC) Manual home (current/archives). ¹
• PSC Manual April 2025 (current edition with code definitions). ²
• DFARS PGI 208.70 coordinated acquisition (assignments including 6605). ³

References

1. Product and Service Code Manual — Acquisition.gov: https://www.acquisition.gov/psc-manual
2. PSC Manual April 2025 (PDF) — Acquisition.gov: https://www.acquisition.gov/sites/default/files/manual/PSC%20Manual%20April%202025.pdf
3. DFARS PGI 208.70 — Coordinated acquisition assignments (includes FSC 6605 partial assignment): https://www.acquisition.gov/dfarspgi/pgi-208.70-coordinated-acquisition