Barrage balloon

A tethered balloon, of the kind flown over cities and harbors in the Second World War to keep low-flying aircraft away. It floats above the sea, an easy target for any gun.

• Destroy it for a one-time bonus of 20 points.
• Capture it by keeping more aircraft than the other side within 250 m of it for a while: your whole team earns a recurring income for as long as you hold it.
• Found in every mode but Bomber Waves.