An off-the-shelf RTL-SDR dongle.
RTL-SDR for VHF Marine Scanner on SDR# – Telecommunications, Navigation & Electronics
RTL SDR Diy Kits Installation Instructions PDF, PDF, High Frequency
Shielding the RTL-SDR
RTL-SDR FM Radio Receiver With GNU Radio Companion : 11 Steps - Instructables
Quick Start Guide
RTL-SDR Tutorial: Analyzing GSM with Airprobe/GR-GSM and Wireshark
Getting Started With SDR (software defined radio): Tutorial - Austin's Nerdy Things
install-rtlsdr-blog