![]() ![]() The trick is that the antenna and power cables must be able to be attached to and removed quickly from the handheld unit. You can also install a power cable for your handheld GPS, connected to the aircraft bus. Don’t even think about drilling holes in a pressurized aircraft without proper data. You don’t want to punch holes in areas where they shouldn’t be. Proper antenna installation is very critical. The antenna must be installed properly by a certified person (A&P or avionics repair station) and in accordance with the FARs. This is much better and safer than a cable running around the controls and antenna bouncing around on the glare shield, and the GPS will usually work better with the external antenna. If you have one of the new portable GPS units, you can use an external antenna attached to the top of the fuselage with a cable run behind the interior. According to the FARs, “portable equipment” cannot be permanently attached to the aircraft. By “portable” we commonly mean anything which is easily carried, but the FAA adds some things to that definition.
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