The investigation by the USCG found that interference from LED lamps has created unsafe conditions in several instances due to severe impairment of a vessel's radio communication. Reception of radiotelephone, AIS, and DSC transmissions on affected vessels was reduced and contributed to the creation of potentially unsafe situations.
The informational alert describes a simple method to test radio receivers for desensitization by LED lamps. Mariners who conduct the testing and find LED lamps are causing interference are invited to contact the USCG with their findings.