Can I track wildlife using VHF radios in the field?

Choosing the Right Equipment

To successfully track wildlife using VHF radios, you’ll need a few essential pieces of equipment. A good quality hand-held VHF receiver with a frequency range of 137-162 MHz is ideal for this purpose. A transmitter collar or backpack with a built-in VHF transmitter and a battery life of at least 3-5 years is also necessary. Additionally, a VHF antenna with a gain of at least 6 dB is recommended to improve signal strength.

Understanding Radio Frequency Propagation

When using VHF radios to track wildlife, it’s essential to understand the principles of radio frequency (RF) propagation. VHF signals generally travel in a line-of-sight (LOS) fashion, with signal strength decreasing rapidly over distance and terrain. To maximize signal strength, operators should use tall antennas and position receivers in locations with unobstructed views of the transmitter. In hilly or mountainous terrain, signal loss can be significant, and specialized antennas or repeaters may be necessary to maintain contact.

Best Practices for Field Operations

Effective field operations using VHF radios to track wildlife require careful planning and coordination. Operators should establish a network of receivers in strategic locations, such as observation towers or vehicles, to provide redundancy and ensure continuous monitoring. Transmitters should be programmed to transmit on specific frequencies, and operators should use a standardized calling procedure to avoid interference and ensure clear communication. Additionally, operators should regularly check and maintain equipment to ensure reliable performance in the field.