EQT Programs

Environmental Qualification Testing Capabilities

G&C provides design, analysis and qualification testing EQT programs. These programs support both government and commercial ships, including environmental qualification testing process for various equipment and systems for shock, vibration, electromagnetic interference (EMI) and other topside environmental requirements. Gibbs & Cox uses Finite Element Modeling (FEA) to design and assess foundations and hull structure, and to pursue shock qualification by way of Dynamic Design Analysis Method (DDAM) and Transient Shock Analyses (TSA).

Gibbs & Cox has supported the FFG 7 Class, DDG 51 Class, and LCS Freedom Class in the preparation, execution and completion of Full Ship Shock Trials (FSST), and is currently supporting the upcoming CVN 78 FSST. In support of the LCS Freedom and CVN Carrier programs, Gibbs & Cox has also fully supported the management and tracking of the EQT process and Shock Deficiency Correction Plans (SDCP) for government furnished equipment EQT.

Survivability Capabilities

Total Ship Survivability requires a balanced and integrated consideration of the differing facets of ship design, including:

  • Susceptibility
  • Vulnerability
  • Recoverability

Gibbs & Cox is able to provide a detailed examination of Modeling and Simulation (M&S) data outputs showing how the results will affect the performance of the vessel and recommend design and changes for improvement.

Signatures and Susceptibility

Regarding Ship Signatures, G&C provides design guidance and analysis, test and data analysis services and ship integration support in the following technical areas:

  • Radar Cross Section (RCS)
  • Acoustic Signature
  • EO/IR Signatures
  • Magnetic Signature/Degaussing
  • Topside Design Integration
  • Electronic Warfare (EW)
  • Noise and Vibration

Vulnerability & Recoverability

Gibbs and Cox has comprehensive experience performing the following functions:

  • Developing and evaluating survivability requirements and system logic construction for naval surface ships related to: Anti-air Warfare (AAW), Anti-surface Warfare (ASuW), Anti-submarine Warfare (ASW) and Electronic Warfare (EW)
  • Coordinating and executing 3D M&S efforts using Monte Carlo Methods to improve naval survivability against AIREX and UNDEX threats and accidental damage at Concept, Basic and Detailed Design stages
  • Generating deactivation diagrams and performing fault tree analysis
  • Performing lifecycle Verification, Validation and Accreditation (VV&A) of M&S software using real-world data
  • Reviewing vessel designs and M&S results to identify design weaknesses and develop recommendations to improve ship survivability
  • Developing naval training scenarios and drill guides based on M&S results


To combat vulnerability and increase recoverability, Gibbs & Cox can develop:

  • Damage Scenario Based Engineering Assessments (DSBEAs)
  • Vulnerability Assessment Reports (VARs)
  • Design Integrated Survivability Assessment Reports (DDISAR)

Engineering Dedicated to Survivability

Gibbs & Cox has a specialty engineering department dedicated entirely to naval ship survivability, with extensive experience in:

  • Modeling and Simulation
  • Test and Evaluation (all phases including LFT&E)
  • Live trial execution at sea for various surface combatant and auxiliary platforms

Gibbs & Cox’s engineers are as comfortable at sea as they are in the office. As test exercises occur both pier-side and while underway, Gibbs & Cox is able to support extended time at sea for T&E events.

Gibbs & Cox successfully executes test events on time, on budget, and while managing live casualties safely. We are also able to process data collection points, interpret and analyze data collected for future design recommendations, and provide findings and lessons learned in report format.

Interested in learning more about survivability analysis?

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“[the] team received very strong endorsement at Design Review #2 placing us in an excellent position for [future phases of the project].   Based on the superb efforts of G&C, they are our trusted design agent for Detail Design and will perform a majority of the design work. … I have been involved in naval combatant ship design for 40 years and have never seen applause at a design review like we received at DR2.  Well Done!”