110 DegaussingCathodic Protection Fundamentals

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  1. The Main coil (M)
    • compensates the induced and permanent vertical components of the ship's magnetic field (Z zone).
    • It is installed in the horizontal plane at the waterline.
    • As the ship changes hemispheres the coil current polarity must be manually adjusted.
  2. FP-QP
    • Forecastle permanent-Quarterdeck permanent coils
    • compensate for the longitudinal permanent component of the ship's magnetic field.
    • The FP coil encircles approximately the forward 1/3 of the ship in the horizontal plane at the main deck.
    • QP coil encircles approximately the aft 1/3 of the ship in the horizontal plane at the quarterdeck.
  3. FI-QI
    • The Forecastle induced-Quarterdeck induced coils
    • Are located in the same area as the FP-QP coils, they compensate for the longitudinal induced component of the ship's magnetic field.
    • is proportional to the horizontal component of the Earth's magnetic field along the ship's longitudinal axis.
  4. A Coil
    • Athwartship coil
    • is installed in the vertical plane and extends from the keel to the main deck.
  5. Degaussing switchboard
    • in CCS
    • USED FOR MONITORING, SET-UP AND CONTROL OF THE DEGAUSSING SYSTEM
  6. Remote control panel
    • in the BRIDGE
    • USED FOR MONITORING OF DEGAUSSING COIL CURRENTS AND ADJUSTING OF HEADING SWITCH
  7. Power supply units
    • in the DEGAUSSING ROOM
    • CONVERTS SHIP’S 450 VOLT/60 HZ INPUT INTO A DC CURRENT FOR THE DEGAUSSING COILS

    • State the purpose of the Impressed Current Cathodic Protection system
    • PUTS OUT A SMALL AMOUNT OF CURRENT, THROUGH ANODES, TO POLARIZE THE SHIP’S HULL, THUS REDUCING CORROSION OF THE HULL.
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311482
Card Set
110 DegaussingCathodic Protection Fundamentals
Description
degaussing
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