Naples Police are dispatched by the Sheriff's Office on 154.815. Listen for car 952. The fire department is dispatched by the County on 46.42. I'm not sure if the ambulance is dispatched on the County EMS channel (155.355) now that they've separated from the fire dept. Gannett Hill is probably the closest tower, but I don't know if Naples agencies are dispatched from that tower or from the Cheshire tower due to the hills.