OLAS Float-On Light The ACR OLAS Float-On is a compact, Smart, crew overboard system. The OLAS Float-On is a buoyant water activated strobe and LED flashlight. The strobe automatically activates in the water when its integrated water sensors detect 6 seconds of water contact. The high-power strobe flashes once every second for up to 20 hours, is visible up to 3 nautical miles away When used in conjunction with the ACR OLAS mobile application technology, and detects a break in its virtual tether