Objective hazards include difficult environmental conditions (e.g., terrain, weather).
As compared to other types of travel, risk for illness and injury with adventure travel is much greater for several reasons (see Box 9-11). Risk for travel-associated illness and injury is a function of 2 variables: probability and consequence. The probability of a mishap occurring is based on the frequency (“how often”), duration (“how long”), and severity (“how bad”) of the hazards encountered; during adventure travel, each is increased. Objective hazards include difficult environmental conditions (e.g., terrain, weather). Dehydration, poor nutrition, and insufficient sleep are examples of subjective or human-controlled hazards.