The two new Limited carriers, Nash's Lightning Carrier and Harlock's Atlas Carrier, have an ability called "Random Launch Override." The special ability gives the hulls a chance to launch "special" UAV units that have a variety of different effects. These special UAVs are rare and do not launch at a high rate; it is entirely possible that, in shorter battles, you may only see one or two special UAVs launch. These are visually differentiated from the other UAV units by a unique color and "glow."
The special UAV types are:
Kamikaze UAV: Detonates after its swarm time is over; its detonation is similar to the shockwave from an Impulse Launcher D92-U.
Special Marathon UAV: This UAV works like the other UAVs being launched but swarms for much longer.
Special Pinch UAV: This UAV pinches an enemy ship; the pinch effect lasts for 1-2 seconds.