Rod Reiss is the name of my fictional aircraft carrier. It's a 1.2 km long, 180 meters wide and 90 meters high slab of metalic foam of an alloy of aluminum, designed to withstand high temperatures. It's fueled by two nuclear reactors and has several propellers along the sides.
Rod Reiss is unsinkable. Anything, short of a nuclear strike, will be just eaten up by this monster. The price of this is that this ship is extremely slow and even worse when when turning.
Warfare on land is not possible in this setting, unless you want to give the White Walters (slighly smarter zombies) free material for their own army (they can turn corpses into dumb zombies with an insanely fast healing factor). Thus, the sea became the no.1 field of war.
There are currently two countries at war and a guy, called God, doesn't like that. God is actually not a god, just genius with lots of time, resources and an unhealthy obsession with japanese cartoons.
God doesn't want to kill, he wants to turn the ships into paper and use it to print anti-war flyers. As for the crew, they'd be escorted back to home, neatly tied up.
Anyway, God built Rod Reiss as a way to end all wars forever. Its purpose is to seek out and abduct entire fleets. Good thing is that these ships have roughly the same specs as Queen Anne's Revenge after BB pimped it out. However, Rod Reiss, at maximum speed, is still slower than these ships.
God blew all his budget on the ship and drone planes, leaving him with absolutely nothing to catch the fleets with.
The drones are your standard reaper drones, he didn't even have time to swap out the armament.
How could Rod Reiss still capture ships with these tools while minimizing the chance of accidental deaths?
Capture means physically closing in on a ship, boarding it, incapacitating the crew (that's the easy part, because powered armor and kung fu). Rod Reiss has an aparatus for lifting out and grinding down ships into a wooden pulp, so that's not the problem.