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   Data updated: 03 Apr 2026. Home |  About Quick Search |  ASSIST |  ASSIST Updates Document Details

Document ID:   DI-NUSU-82343       Scroll down to access document images

Overview
Title:  Hardness Maintenance (HM) and Hardness Surveillance (HS) Plan
Scope:  The Hardness Maintenance (HM) and Hardness Surveillance (HS) Plan applies to both parts of military standard MIL-STD-188-125, High-Altitude Electromagnetic Pulse (HEMP) Protection for Ground-Based Facilities Performing Critical, Time-Urgent Missions. This DID applies to fixed facilities in accordance with Part I (MIL-STD-188-125-1A) and to transportable systems in accordance with Part II (MIL-STD-188-125-2). This DID contains the format, content, and intended-use information for the data deliverable resulting from the HM/HS tasks described in section 4.5 of each part of MIL-STD-188-125, as applicable.  The purpose of the HM/HS program is to ensure that the HEMP-protection subsystem’s (HPS’) hardness levels are preserved throughout the service life of the facility or system. HM/HS procedures comprise the preventive maintenance, inspection, test, and repair activities accomplished on a HEMP protected operational facility or system.
Status:  Active DID Date:  26-JUL-2021      
  Next Review Due:  25-JUL-2026
NUSU Doc Category:   Data Item Description  

Responsibilities
DID Approval Authority:  DS  Defense Threat Reduction Agency (DTRA), (DepSo)
  Preparing Activity: DS  Defense Threat Reduction Agency (DTRA), (DepSo)
DoD Interest Level:  / Prepared by DoD activity
Coordination:  Full  

Revision History Click on column headings for a description of column content.
MediaDocument Part DescriptionDist StmtDocument DatePagesSize
Document ImageNotice 1 - AdministrativeA26-JUL-20211189.3 KB
Document ImageBase Document A31-MAR-20214192.3 KB

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