Abstract: This Automatic Safety Flag for Boats and Water Recreational Vehicles relates to a system that automatically raises and lowers a flag mast, which may be telescoping, and with a safety flag located at or near the terminal end of said mast, located on said boat or water vehicle. The flag mast automatically raises the flag when the velocity of the boat or vehicle is traveling below approximately 5 miles per hour or is traveling at a wakeless velocity, and the mast automatically lowers when the boat or water vehicle velocity is above approximately 5 miles per hour. There are two sets of embodiments disclosed. The electromechanical embodiment utilizes an electric motor to automatically raise and to lower the flag mast at said desired water vehicle velocities, and said motor is controlled electrically by a speed transducer, speedometer, or the like.