12 GMR 404/406 Marine Radar Installation InstructionsFCC ComplianceThe GMR 404/406 complies with Part 80 of the FCC rules. It has received a grant of equipment authorization, issued under the authority of theFCC.This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, maycause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off andon, the user is encouraged to try to correct the interference by one of the following measures:• Reorient or relocate the receiving antenna.• Increase the separation between the equipment and the receiver.• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.• Consult the dealer or an experienced radio/TV technician for help.CAUTION: Use the GMR 404/406 at your own risk. To reduce the risk of unsafe operation, carefully review and understand all aspectsof this Installation Manual, and thoroughly practice operation using the simulator mode prior to actual use. When in actual use, carefullycompare indications from the GMR 404/406 to all available navigation sources, including the information from other NAVAIDs, visualsightings, charts, etc. For safety, always resolve any discrepancies before continuing navigation.CAUTION: IT IS THE USER’S RESPONSIBILITY TO USE THIS PRODUCT PRUDENTLY. THIS PRODUCT IS INTENDEDTO BE USED ONLY AS A NAVIGATIONAL AID AND MUST NOT BE USED FOR ANY PURPOSE REQUIRING PRECISEMEASUREMENT OF DIRECTION, DISTANCE, LOCATION, OR TOPOGRAPHY.WARNING: The radar scanner transmits electromagnetic energy. Ensure that the scanner has been installed according to therecommendations given in this guide, and that all personnel are clear of the scanner before switching to transmit mode.WARNING: This product, its packaging, and its components contain chemicals known to the State of California to cause cancer, birthdefects, or reproductive harm. This Notice is being provided in accordance with California’s Proposition 65. If you have any questions orwould like additional information, please refer to our Web site at http://www.garmin.com/prop65.WARNING: For protection from lightning, this installation must conform to NFPA code, section 302. The installation of a lightningprotective mast is recommended, and the scanner must be connected to water ground using an 8 gauge copper cable.Warnings and Cautions