Alyssian Beam Array Weapons: 4 x PL-6 Beam Cannons Maneuverability: N/A Firepower: PL-6 Beam Cannon Mass: 500 Hull Points: 1,000 Armor: None Shields: 200 Requirements: E4, M4, C--, EX--, EL2, A-- This Asteroid Base defense upgrade replaces the PS13 IPC with the Beam Array ion beam cannon, a substantial firepower upgrade for a commensurately substantial upgrade in cost due to the sophistication of the tracking system and the power plant upgrade necessary to operate the beam weapons.