For a resource cost, the Ruiner randomly spreads Gravity Mines around its current position.
|Research Cost:||1400 250 400|
|Resource Cost:||570 135 70|
Because they deal no damage, gravity mines can easily be cleared by running inexpensive units such as scouts or flak frigates through them. Although the units will be slowed and unable to phase jump for the time period, this can quickly destroy a large number of mines. To use gravity mines effectively, you must use them to trap retreating enemies, which usually means deploying them during the fight to block the enemy.
In most situations, explosive mines are superior since they will kill weaker frigates and cruisers, or leave them so injured that your other units can clean them up. Gravity mines are primarily useful against capital ships, which have sufficient durability to survive regular explosive mines.