AO3 Gilbert Arambul hammers an oversized spanner wrench to loosen a control accumulator cover in lower-stage weapons elevator room five. The control accumulator holds 1500 PSI of hydraulic pressure. (U.S. Navy photo by Mass Communication Specialist Seaman
Justin Johndro/Released)

Story by Mass Communication Specialist 2nd Class
Heather Seelbach

In the Navy, EMI doesn’t always mean extra military instruction; in the case of weapons elevators, it refers to electro-magnetic interference, which can cause weapons elevator doors and hatches to operate inadvertently.

This week, engineers from Naval Sea Systems Command (NAVSEA) and Sailors from weapons department’s G4 division are performing an upgrade on upper stage weapons elevator 2. Once the upgrade is complete, NAVSEA will train G4 on how to operate and maintain the new equipment.

“We are changing out the standard electronic module on CVN 71, 72, 73, 74 and 75,” said Bradley Luck of NAVSEA. “Stennis is the last ship to receive this upgrade.”

The upgrade should avert hazards to crew members caused by EMI, and the new modification will allow for a safer work environment and better equipment reliability.

“Anything from a walkie-talkie to a cell phone can cause EMI, and the current control system is susceptible to it,” said Luck.

To remedy this problem, NAVSEA employees and G4 Sailors are installing a power conditioner in the weapons elevator system, which will filter power sources going into the elevator control system.

“The whole upgrade was done to prevent random activation of the system to ensure that the elevator is ready for operation and in the same condition we left it,” said Electrician’s Mate 1st Class (SW/AW) James Roberts.

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