Mars Defense Perimeter spacecraft

The mighty defenders of Earth

Mars Defense Perimeter spacecraft were only seen in part two of TNG "Best of Both Worlds", attempting to intercept and destroy or repel a Borg Cube that was approaching Earth. Only three were seen.

Specifications

We know almost nothing about these spacecraft.

• It is not clear whether they are manned warships or drones of some kind.
• It is not clear whether they have warp capability or are limited to impulse speeds.
• It is not clear whether they are armed with weapons like phasers and photon torpedoes or behave more like long-range missiles.
• It is not clear whether they have shields to protect them from enemy fire.

What is clear is that the Borg ship made short work of them, destroying each with a single weapon pulse.

Non-canon

According to the Star Trek Encyclopedia, these ships are unmanned drones.