At Tier3, the TEC scout ship gains an ability to lay down timed explosives. These explosives are placed directly on an orbital structure. The scout frigate suffers a 50% damage penalty while placing the explosive. After 15 seconds total it blows up, dealing 1200 damage, minus armor effects. After using it, they need to wait 15 minutes before trying again (basically, they only live for one attempt)

I'm curious if anyone has used this to painful effect? A dozen or so scout ships can easily run an early game blockade, and dump their explosives on many structures. For an extremely low cost, you could do a lot of damage to space infrastructure, even deep in enemy territory.

Some questions about the ability:
Q: Can you place multiple explosives at once, or do they all have to wait until the previous one goes off?
A: Yes, they do stack!
Q: Can you use the ability on targets under construction? This would be especially deadly for opponents that try to get last minute defenses up.
A: I have not tried it yet, but see no reason why it shouldn't.