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MESMA AIP

The MESMA AIP (Autonomous Submarine Energy Module) is an electrical energy production module designed specifically for conventional submarines. As well as supplying electricity to the vessel and to the propulsion system, it can also be used to recharge the batteries without the need to surface.
The MESMA AIP quadruples the underwater range of a conventional submarine, which significantly extends its scope of action and enhances its stealth performance.


In 2008, during intensive sea trials, the MESMA operated perfectly and achieved the expected performance.

The MESMA AIP has been selected to equip Pakistan's Agosta type submarine.

The MESMA is a compact unit, which can be fitted at the trial stage, or retrofitted during modernization.

  • Enhanced operational performance: Increased scope of action and enhanced underwater range, without restricting dive depth
  • Acoustic discretion:  The MESMA is quiet because it is fitted into a frame that is itself insulated from the hull by elastic suspension.
  • Compactness:  Fitting into a single section of the submarine, it offers excellent power to size characteristics
  • Safety: Hydrogen storage. The MESMA is designed to meet the highest demands in terms of robustness and shock resistance.
  • Reliability: MESMA has been developed from mature technologies that have been proven by DCNS over many years.  

Characteristics :

  • A combustion module
  • An oxygen module
  • A steam module coupled to a turbo-alternator
  • An automatic control system
  • Power delivery: 200 kW