It's better to travel in a small group (3 or 4 minimum) so that if one is hurt and/or a victim of exposure, an evacuation can be started immediately. Use the buddy system, developed by scuba divers to ensure immediate rescue and life support if indicated.

Operators in the field should dress in layers, and have a personal thermometer and wind chill charts to have a realistic assessment of conditions, and thus risks. z

Batteries drain faster in the cold so insulate yours for longer life.

Have a personal heat source such as chemical hand warmers not only for your hands, but tucked in shirt pockets under your jacket and/or pants pockets to keep the body's core warm for better functioning and safety.

Have a comprehensive knowledge of the area in which you are working, and carry a map and compass (plus a GPS receiver), and know how to use them.

Your eyes are among the most important navigational aids that you have, so protect them with ski goggles and/or sun glasses, approved for the demanding operating environment (glare from snow, etc.).

-- Frank E. Bonneau Jr., N7WCF