Here is what Captain Kirk’s ship could do to the North Korean navy
With the news that the stealth destroyer USS Zumwalt (DDG 1000), under the command of United States Navy Capt. James A. Kirk (we won't know for another two centuries if he is related to James T. Kirk), is potentially deploying off the North Korean coast.
The question many will ask is: "What can the Zumwalt do against the North Korean Navy?"
The short answer is: "A lot."
Let's take a look at the firepower the Zumwalt carries. According to a US Navy fact sheet, the USS Zumwalt packs two 155mm Advanced Gun Systems, two 30mm "Close-In Guns," 80 Advanced Vertical-Launch System cells, and two M-60R helicopters capable of carrying torpedoes and AGM-114 Hellfire missiles.
The 80 missile cells can carry BGM-109 Tomahawk cruise missiles, RIM-162 Evolved Sea Sparrow Missiles, RIM-66 SM-2 Standard Missiles, and RIM-174 SM-6 Extended Range Active Missiles.
This is a very powerful weapons suite.
To compare, let's look at the North Korean navy's most powerful ship, which is known as 823 — the only Soho-class frigate in service. According to the "16th Edition of Combat Fleets of the World," that ship has four single SS-N-2 launchers; a single 100mm gun; two twin 37mm guns; two twin 30mm guns; and two twin 25mm guns.
"Combat Fleets" notes that the North Korean Navy also has at least one Najin-class light frigate, and 15 missile boats, all armed with at least two SS-N-2A missiles.
How does the Zumwalt fare against this swarm? The good news is that the helicopters on board will likely be able to pick off a number of the missile boats before they can launch their missiles.
Since each MH-60 carries four Hellfires, we can assume that the fifteen missile boats will be cut down some. Zumwalt will probably empty her Tomahawks at North Korean targets as well.
Lil' Kim ain't gonna like how that ends up.
The survivors may launch their missiles at the Zumwalt but the SS-N-2A is a much less advanced missile than the Noor anti-ship missiles launched at USS Mason (DDG 87) on multiple occasions of the coast of Yemen in October. Zumwalt, with the ability to use the same missiles as the Mason did, will likely be able to shoot them down or decoy them using chaff.
At this point, the Zumwalt will use her 155mm guns to take out any North Korean surface vessels that try to approach. What rounds they will fire is up in the air due to the cancellation of the Long-Range Land Attack Projectiles, but there are a number of options that she can use aside from spitballs.
Once she dispatches the surface force, the Zumwalt will then make sail away from the coast to evade North Korea's sizable force of old electric (and quiet) submarines. Any that are close will likely get a torpedo from a MH-60.
In short, the Zumwalt can trash the North Korean Navy's surface fleet. Her Tomahawks will trash their bases. Then, she will reload and come back to hit land targets with her weapons.