A shipset of eight Helios Stackable Rack (HSR) modules has completed operational test and evaluation and was fielded this week in support of a US DoD end customer. The 14U modules stack 2 units high in the DHC-8-315, and they house up to 400 lbs of equipment per stack. The modular nature of the HSR allows for rapid integration, flexibility for non-rack-mounted equipment, and easy access to both sides of the LRUs.