In the sometimes hostile waters of the Persian Gulf looms the US Navy's first - in fact, the world's first - active laser weapon. The LaWS, an acronym for Laser Weapons System, is not science fiction. It is not experimental. It is deployed on board the USS Ponce amphibious transport ship, ready to be fired at targets today and every day by Capt. Christopher Wells and his crew. CNN was granted exclusive access to a live-fire test of the laser. It is more precise than a bullet," Wells told CNN. "This is a very versatile weapon, it can be used against a variety of targets." For the test, the USS Ponce crew launched the target - a drone aircraft, a weapon in increasing use. Immediately, the weapons team zeroed in. "We don't have to lead a target," Hughes explained. "We see it, we focus on it, and we can negate that target." In an instant, the drone's wing lit up, heated to a temperature of thousands of degrees, lethally damaging the aircraft and sending it hurtling down to the sea. The strike comes silently and invisibly. "It operates in an invisible part of the electromagnetic spectrum so you don't see the beam, it doesn't make any sound, it's completely silent and it's incredibly effective at what it does," said Hughes. All the $40 million system needs to operate is a supply of electricity, which is derived from its own small generator, and has a crew of three. No multi-million-dollar missile, no ammunition at all. The cost per use? "It's about a dollar a shot," said Hughes.