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Radar Endorsement

A Radar Endorsement is a license issued by the FCC granting the holder authority to repair, maintain, or internally adjust marine radar equipment. The radar endorsement is not a standalone license, it is only valid when attached to one of the following: GROL, GMDSS Maintainer, GMDSS Operator/Maintainer, T1, or T2.

Radar mast of a cruise ship
A Radar Endorsement grants the licensee authority to repair, maintain, or internally adjust marine radar equipment.

Radar Endorsement Exam

The radar endorsement is contained in FCC test element 8 and is commonly taken at the same time as the GROL, or GMDSS Maintainer Exam.

Radar Endorsement Exam Element 8

Element 8 contains questions about radar theory and practice applicable to the proper installation, servicing, and maintenance of ship radar equipment.

  • Marine Radar Systems
  • Power, Range, Pulse Width, PRR and PRF
  • Radar Circuits
  • Radar Transmitting Systems
  • Magnetrons
  • Pulse Forming Networks Modulation
  • TR - ATR, Circulators, Directional Couplers
  • Timer - Trigger - Synchronizer Circuits
  • Receiving Systems
  • Mixers, Oscillators
  • Amplifiers
  • Detectors - Video Amplifiers
  • Automatic Frequency Control - AFC
  • Sea Clutter, STC and other Interference Issues
  • Displays and Control Systems
  • Timing Circuits
  • Fixed Range Markers
  • Variable Range Markers
  • EBL, Azimuth and True Bearing
  • Antenna Systems
  • Transmission Lines
  • Antenna to Display Interface
  • Waveguides
  • Installation, Maintenance and Repair
  • Safety

For more information on the GMDSS Operator license, visit the FCC page here.

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