Field Radio
Protocols
Technical standards for VHF/UHF communication in the most remote Himalayan sectors. Master the signal where cellular networks terminate.
Frequency Allocation
VHF Band
High-RangeOptimal for line-of-sight communication between ridge lines and plateau sectors. Penetrates thin air more effectively at high altitudes.
UHF Band
Close-RangeIdeal for tight-formation driving and canyon floors where signals bounce off rock walls more effectively than VHF.
Signal Propagation
The "Dead Zone" Phenomenon
In deep Himalayan gorges like the Karnali, VHF/UHF signals are severely shielded by high vertical walls. Understanding "Knife-Edge Diffraction" is critical for maintaining contact.
Ridge Strategy
Always transmit from the highest available point. Signal range can extend from 5km to 30km+ depending on altitude.
Gorge Strategy
Signals will fail within 1km if direct line-of-sight is lost. Use UHF for better diffraction off rocky surfaces.
Regulatory Compliance
Transmission on the Amateur or Business bands in Nepal is strictly regulated.
- Licensing: A valid Amateur Radio License (Ham License) is required for non-emergency transmission on VHF/UHF.
- Equipment: All radios must be declared during the permit process for restricted sectors like Humla.
- Emergencies: International law recognizes the use of any frequency to seek assistance during a life-threatening crisis.