Maximum continuous rating

Maximum continuous rating

Maximum continuous rating (MCR) is defined as the maximum output (MW) that a generating station[clarification needed] is capable of producing continuously under normal conditions over a year. Under ideal conditions, the actual output could be higher than the MCR.[1]

Within shipping, ships usually operates at the nominal continuous rating (NCR) which is 85% of the 90% of MCR. The 90% MCR is usually the contractual output for which the propeller is designed. Thus, the usual output at which ships are operated is around 75% to 77% of MCR.[2]


  1. ^ IESO
  2. ^ Danish proposal to a design CO2 index for new ships to the UN’s International Maritime Organization (IMO) from the Danish Maritime Authority

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