This video demonstrates the patient assessment system and is a part of the online wilderness medicine courses offered by Base Medical. Learn more at: www.base-medical.com/
Not a first aid supply or equipment, but I always carry a GPS when I hike or backpack and a communication device. With the GPS you can give responders coordinates to assist them to locate the victim quickly and if necessary give to air evacuation crews. Some GPS systems also assist in communications via satellite, useful if cell phone towers are not accessible.
100%. No matter how much gear or education you have there will always be the potential for situations that can't be handled within the group - being able to call for help is lifesaving in many cases. Communicating where you are is an essential part of this.