When connected to a Pioneer navigation receiver, the user's top stations become radio preset buttons to enable convenient control of stations just like a traditional radio.

ENGADGET: Pioneer reveals three new in-dash touchscreen multimedia receivers with AppRadio, DVD, SiriusXM and more

To further enhance smartphone connectivity, each model is equipped with Pioneer's AppRadio Mode (previously known as Advanced AppMode), which offers an "AppRadio-like" experience for both iPhone and Android owners, giving users the ability to access and control dozens of apps directly from the navigation receiver's large touchscreen display when connected to iPhone 4 or iPhone 4S, iPhone 5, or a compatible Android smartphone.

ENGADGET: Pioneer reveals three new in-dash touchscreen multimedia receivers with AppRadio, DVD, SiriusXM and more

Each onboard ADS-B set consists of a Global Positioning System satellite navigation unit, two Pentium microprocessors, some software and a radio transmitter-receiver--not much more gear than you would find behind the dash of a new Cadillac.

FORBES: Free flight

While most of you probably carry an all-in-one NAV with a built-in GPS receiver, the MG-920 is designed to connect to Bluetooth navigation systems that need a little help syncing with satellites, and although the SiRF Star III LP chip and rechargeable Li-ion cell are entirely average, the bottom-mounted FM transmitter allows a turn-by-turn instructor to be channeled to one's FM radio.

ENGADGET: Mainnav MG-920 Bluetooth GPS receiver touts FM transmitter