IHADSS… Halt! Get Software Upgrade for HOLT

If you maintain or use the helmet operational level tester (HOLT), NSN 4931-01-534-1228, for the Apache integrated helmet and display sight system (IHADSS), make sure you have the latest version 8 software update.

The previous update, version 7, had reset issues that kept the HOLT from functioning properly during start-up. To determine which software version your HOLT has, turn the power switch to the ON position. The software version will be listed on the second line of the first screen of the built-in test (BIT).

If your HOLT has the wrong software update, get a software update kit by contacting James Casto at (586) 282-1359 or by email:


Be sure to provide a good shipping address and POC so an upgrade kit can be mailed to you.


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