Abstract: A personal visibility mark may increase the visibility of a person in the water to operators of watercraft or the like and may be used in combination with a personal floatation device. The personal visibility mark may include a housing including at least one intake opening. The housing may be removeably coupled to a personal floatation device or may be an integral component of the personal floatation device. A pump may be disposed within the housing and may be fluidly coupled to the intake opening and at least one nozzle for expelling a stream of water from the nozzle to increase the visibility of a user. The stream of water may include an interrupted stream. The interrupted stream may be provided by modulating the power to the pump and/or providing a self-resonating nozzle.