Any pilot will tell you that a Xenon strobe flash is
visible at great distances and pinpoints a location. That’s why
clipping one on your life jacket, life ring, and throw lines makes
and waterproof tested to 12 ft minimum depth to ensure reliability for
all SAR situations.3-4 mile visibility at sea level
operates at 50-60fpm (flash per min) for 8-12 hours and then switches to
20-30 fpm for another 8-12 hour shift.