I am writing you concerning the approval of a LightSquared

electronic transmitter that may have deleterious effect on GPS signal reception.

I personally have several GPS receivers that I use, both in my automobile and airplane. The ones in my airplane are used for primary navigation. Any degradation of the GPS signal could result in an accident with all of it's associated consequences.

Please ensure that this technology is compatible with other users of the electromagnetic spectrum and does not impose any undue hazard to other users.

Thank You

Giffen Marr