Degaussing Systems

The Wärtsilä degaussing system "DEG COMP MOD 2" is versatile, suitable for deployment on all classes of naval vessels. It is capable to compensate the permanent induced and eddy current magnetic interference fields of naval vessels to specified target signatures. It´s non magnetic design allows deployment also on Mine Countermeasure Vessels (MCMV) and on non-magnetic submarines.

The heart of the system is the computer-based Degaussing Control Unit (DCU), which accommodates the MMI and interfaces to the other main system components. For control and monitoring, standard interfaces are provided.

System configuration

The Wärtsilä  degaussing system "DEG COMP MOD 2" is versatile, suitable for deployment on all classes of naval vessels. It is capable to compensate the permanent induced and eddy current magnetic interference fields of naval vessels to specified target signatures. It´s non magnetic design allows deployment also on Mine Countermeasure Vessels (MCMV) and on non-magnetic submarines.

    Degaussing Control Unit

    Heart of the system is the computer based Degaussing Control Unit (DCU), which accommodates the MMI and interfaces to the other main system components. For control and monitoring, standard interfaces are provided.

    In automatic mode the DCU receives the actual magnetic earth field data either from the magnetic probe system or by calculations derived from a geophysical model as data base and inputs from the vessels´ navigation system. To this end the DCU is equipped with a suitable memory, which contains the algorithms of the geophysical model for generation of the magnetic earth field data. In emergency mode the navigation data can be input manually.

    At any given moment the system automatically calculates the required sum current for each degaussing coil, which is composed of the permanent-, induced- and in it´s maximum configuration also the eddy current content.

    On the basis of this calculation each degaussing power amplifier generates the required DC sum current to feed the related connected coil. Menu controlled interactive communication between the user and the DCU is effected via a display with attached keyboard and functional softkeys. Error messages are generated in case specified limits are exceeded, or undesired operational conditions prevail.

    DEG-Comp-MOD

    Power Supply Unit

    Depending on the respective type of vessel the "DEG COMP MOD 2" system makes use of two different coil supply concepts:

    • The centralised coil supply concept, which is intended for vessels having a low-power demand per coil e.g. MCMVs and non-magnetic submarines. This allows the power amplifiers for the individual degaussing coils to be arranged in a centrally located amplifier cabinet.
    • The decentralised coil supply concept, which is intended for vessels having a higher power demand per coil e.g. ferromagnetic surface combatants and supply vessels. They make use of individual Degaussing Power Amplifier Units (DPU) arranged near the connected coil.

    Both power supply concepts use a family of current controlled amplifiers of different configuration and power rating, each suitable for the direct supply of the respective sum current to the connected degaussing coil.

    cabinet

    Intelligent Terminal

    The Inteligent Terminal provides features for magnetic signature prediction of the vessel to the ship’s command according to the actual operational conditions. The Inteligent Terminal can be employed together with Wärtsilä SAM’s degaussing system technology "DEG-COMP” or as a "stand-alone” equipment.

    The Inteligent Terminal is designed for the following operational modes:

    • Signature prediction
    • Optimization of ship’s magnetic signature
    • Mine hazard calculation
    • Remote control function
    intelligent terminal

    Advantages

    In comparison to conventional degaussing systems the Wärtsilä degaussing system DEG COMP MOD 2 offers the following system inherent advantages:

    • Optimised power consumption by the application of the sum current principle i.e. the use of common coils for compensation of the vessels total magnetic interference field.
    • Reduced quantity of coil cables and subsequent reduction of weight and cost for cables and cable installation.
    • Improved system reliability, availability and maintainability due to increased numbers of independent coil amplifiers and independent control sources.
    • Improved capability for integration due to small dimensions of the system components and the possibility to use independent control data sources. The application of the magnetic probe system
      can be deleted if the installation of the tri-axial probe is not feasible - as on submarines - and the function of the probe is replaced by the geophysical model and support from the navigation system.
    • Improved capability for magnetic calibration of the Degaussing system during ranging. Input of coefficients at the MMI of the Degaussing Control Unit instead of wiring changes at the Degaussing switch boxes of conventional systems.

    Related products

    Contact us

    Please fill in the form if you have an enquiry. Fields indicated with an asterisk (*) are required. We aim to respond within 1-2 business days depending on the scope of your enquiry.

    For an existing installation, please provide the necessary details to identify the installation and the equipment.

    Find your local Wärtsilä office here

    © 2022 Wärtsilä