Essential Services

Essential services are those necessary for the propulsion and safety of the unit, such as the following:

  • Electric propulsion equipment.
  • Thruster systems for dynamic positioning.
  • Thruster systems for positional mooring.
  • Abandonment systems dependent on electric power.
  • Ventilation systems for hazardous areas and those maintained at an overpressure to exclude the ingress of dangerous gases.
  • Wellhead control and disconnection systems dependent on electric power.
  • Electric starting systems for oil engines.

Other items as given in Pt 6, Ch 2,1.6.1 of the Rules for Ships.

Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 6, Control and Electrical Engineering, June 2013, Lloyd’s Register, Global Standards

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