This study summarizes results of functional requirements synthesis in creation of unmanned aerial vehicle modular sensor system payload for mountain rescue and snow search operations. A proposed suite of multi-channel remote biophysical monitoring equipment includes: high resolution video camera, night vision camera, uncooled thermal imaging camera, directional audio recorder, compact scanning lidar, cell phone signal detection system, radio-frequency beacon tracker, active avalanche beeper, subsurface radar, bio-radar. Variable fixed units for telemedicine missions are complemented with emergency medical equipment and removable first aid kits.