Final answer:
Dead reckoning is a navigation technique used by pilots to estimate their current position based on their previous position, course, speed, and time. It takes into account the effect of wind speed and aircraft performance on the total velocity of the plane.
Step-by-step explanation:
Dead reckoning is a navigation technique used by aircraft pilots to estimate their current position based on their previous position, course, speed, and time. It takes into account the effect of wind speed and aircraft performance on the total velocity of the plane. For example, if a plane is flying against a headwind and crosswind, its total velocity will be significantly less than its velocity relative to the air mass and it will also be heading in a different direction.