GPS World 2016 October Reader Poll Question Title * 1. Have you directly experienced any of the following? Check all that apply. (Required.) GPS/GNSS jamming. GPS/GNSS spoofing. Unintentional RF Interference RF interference from unknown source; unknown whether intentional or not. None of the above. Other (please specify) Question Title * 2. Enter GPS World’s random drawing for this poll to win a $50 Visa Gift Card. Name: Company: Country: Email Address: Email Address Again: Done