Flashing Beacons Explosion Proof, Marine & Industrial Flashing Beacons PSC VODEC flashing beacons provide secure, efficient, reliable visual annuciation of alarm conditions in high noise areas. The range includes rugged weatherpoof varients that enable operation in aggressive industrial environments as well as highly saliferous marine applications. Zone 1 ATEX certified flashing beacons enable safe operation in potentially explosive atmospheres and use of xenon gas dischage tube light sources eliminate mechanical/moving parts enabling long trouble free life.