Navy deals with the threat of drones

 Popular Science:

The US Navy is testing out drone-zapping laser weapons 
A demonstration from the USS Portland is the most recent example of how using a laser could be a cost-effective way to fight threats.
...

To better understand modern directed-energy weapons, it’s important to take a step back from the science-fiction idea of a laser weapon. High-powered beams of light are expensive to develop and deploy, but they offer a kind of cost-savings once they are up and running. Provided a ship can generate the electrical power needed, a laser is, shot for shot or threat for threat, a cheaper mechanism than anti-air missiles or potentially even .50 caliber bullets for destroying incoming attacks.

If the threats the Navy wants to defeat are cheap, such as Qasef-1 drones, then what the Navy needs to deploy is a countermeasure that’s also cheap to use.

Drones, especially loitering munitions that fly like drones but attack like missiles, are a durable and increasing threat in modern warfare. Some of the groups fighting in Yemen have used expendable drones as missiles in far-reaching attacks, and plenty of modern anti-air defenses, like anti-plane missiles, are at best cost-ineffective against drones, and sometimes even unable to detect and intercept drone attacks.
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I suspect the Navy is having to deal with the threat of Iranian drones in the Persian Gulf and Yemen. 

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