Comments Requested on GPS Interference

The USCG is requesting information from vessel operators on problems with, and potential solutions to, GPS system interference. The USCG states mobile telephones and other electronic devices employing Mobile Satellite Services (MSS) can interfere with GPS systems. This interference has the potential to adversely affect the safe navigation and operation of vessels using GPS technology. These problems resulted from the assignment of adjacent radio frequencies to MSS and GPS systems. Because of the proximity of their radio frequencies, the relatively high powered MSS transmissions can interfere with GPS receivers. One possible solution being considerd would be the limitation or restriction of MSS on certain maritime vessels, similar to the airline industry's restrictions on the use of electronic devices in airplanes. The USCG is seeking feedback on the following questions: · How might potential regulation of MSS, specifcally onboard restriction or limitation of MSS, affect vessel operators? · What standards are ncessary to limit the susceptibility of GPS receivers to interference? · What instances of GPS/MSS interference have vessel operators experienced, including a description of the location, vessel and equipment involved, especially the distance between the GPS antenna and the MSS electronic device? The USCG will accept comments until November 15.