The intrinsically-safe MML is used for indicating tracking and emergency status in mines where two-way voice communications are not required.

It is an integrated component of the Accolade system to continually track workers and permit them to both initiate and receive emergency warnings.

The locator device can also sound an audio alert when it goes out of network.

The MML, which complements the existing Miner Mesh Radio, is compliant with MSHA’s Program Policy Letter on approved communications and tracking systems.

“We are excited to provide this new enhanced capability to our Accolade system,” mine solutions vice president Victor Young said.

“The MML offers an additional means for operators to satisfy mandated safety requirements while reducing overall system costs for new Accolade users.”

L-3’s Accolade was originally developed under a research and development contract from the National Institute for Occupational Safety and Health and was designed to meet the requirements of the MINER Act of 2006.

The self-healing, redundant and survivable voice and data network with peer-to-peer communication was approved by MSHA in December 2008.

It also has been green-lighted by the state of West Virginia and the commonwealth of Pennsylvania.

L-3 Global Security Solutions is a unit of L-3 Services Group.