Regulation 24 - Required EEDI
Clasification Society 2023 - Version 9.38
Statutory Documents - IMO Publications and Documents - International Conventions - MARPOL - International Convention for the Prevention of Pollution from Ships - Annex VI - Regulations for the Prevention of Air Pollution from Ships - Chapter 4 - Regulations on Energy Efficiency for Ships - Regulation 24 - Required EEDI

Regulation 24 - Required EEDI

 1 For each:

  • .1 new ship,

  • .2 new ship which has undergone a major conversion, and

  • .3 new or existing ship which has undergone a major conversion that is so extensive that the ship is regarded by the Administration as a newly constructed ship

which falls into one of the categories in regulations 2.2.5, 2.2.7, 2.2.9, 2.2.11, 2.2.14 to 2.2.16, 2.2.22, and 2.2.26 to 2.2.29 and to which this chapter is applicable, the attained EEDI shall be as follows:

Attained EEDI ≤ Required EEDI = (1−) Reference line value

where X is the reduction factor specified in table 1 for the required EEDI compared to the EEDI reference line.

 2 For each new and existing ship that has undergone a major conversion which is so extensive that the ship is regarded by the Administration as a newly constructed ship, the attained EEDI shall be calculated and meet the requirement of paragraph 1 of this regulation with the reduction factor applicable corresponding to the ship type and size of the converted ship at the date of the contract of the conversion, or in the absence of a contract, the commencement date of the conversion.

Table 1 - Reduction factors (in percentage) for the EEDI relative to the EEDI reference line

Ship Type Size Phase 0
1 Jan 2013
31 Dec 2014
Phase 1
1 Jan 2015
31 Dec 2019
Phase 2
1 Jan 2020
31 Mar 2022
Phase 2
1 Jan 2020
31 Dec 2024
Phase 3
1 Jan 2022
and onwards
Phase 3
1 Jan 2025
and onwards
Bulk carrier 20,000 DWT and above 0 10   20   30
10,000 and above but less than 20,000 DWT n/a 0-10*   0-20*   0-30*
Gas carrier 15,000 DWT and above 0 10 20   30  
10,000 and above but less than 15,000 DWT 0 10   20   30
2,000 and above but less than 10,000 DWT n/a 0-10*   0-20*   0-30*
Tanker 20,000 DWT and above 0 10   20   30
4,000 and above but less than 20,000 DWT n/a 0-10*   0-20*   0-30*
Container ship 200,000 DWT and above 0 10 20   50  
120,000 and above but less than 200,000 DWT 0 10 20   45  
80,000 and above but less than 120,000 DWT 0 10 20   40  
40,000 and above but less than 80,000 DWT 0 10 20   35  
15,000 and above but less than 40,000 DWT 0 10 20   30  
10,000 and above but less than 15,000 DWT n/a 0-10* 0-20*   15-30*  
General Cargo ships 15,000 DWT and above 0 10 15   30  
3,000 and above but less than 15,000 DWT n/a 0-10* 0-15*   0-30*  
Refrigerated cargo carrier 5,000 DWT and above 0 10   15   30
3,000 and above but less than 5,000 DWT n/a 0-10*   0-15*   0-30*
Combination carrier 20,000 DWT and above 0 10   20   30
4,000 and above but less than 20,000 DWT n/a 0-10*   0-20*   0-30*
LNG carrier*** 10,000 DWT and above n/a 10** 20   30  
Ro-ro cargo ship (vehicle carrier)*** 10,000 DWT and above n/a 5**   15   30
Ro-ro cargo ship*** 2,000 DWT and above n/a 5**   20   30
1,000 and above but less than 2,000 DWT n/a 0-5*,**   0-20*   0-30*
Ro-ro passenger ship*** 1000 DWT and above n/a 5**   20   30
250 and above but less than 1,000 DWT n/a 0-5*,**   0-20*   0-30*
Cruise passenger ship*** having non-conventional propulsion 85,000 GT and above n/a 5** 20   30  
25,000 and above but less than 85,000 GT n/a 0-5*,** 0-20*   0-30*  
  • * Reduction factor to be linearly interpolated between the two values dependent upon ship size. The lower value of the reduction factor is to be applied to the smaller ship size.
  • ** Phase 1 commences for those ships on 1 September 2015.
  • *** Reduction factor applies to those ships delivered on or after 1 September 2019, as defined in paragraph 2.1 of regulation 2.
  • Note: n/a means that no required EEDI applies.

 3 The reference line values shall be calculated as follows:

  • Reference line value = a b−c

where a, b and c are the parameters given in table 2.

Table 2 - Parameters for the determination of reference values for the different ship types

Ship type defined in regulation 2 a b c
2.25 Bulk carrier 961.79 DWT of the ship where DWT≤279,000

279,000 where DWT > 279,000

0.477
2.2.7 Combination carrier 1,219.00 DWT of the ship 0.488
2.29 Containership 174.22 DWT of the ship 0.201
2.2.11 Cruise passenger ship having non-conventional propulsion 170.84 GT of the ship 0.214
2.2.14 Gas carrier 1,120.00 DWT of the ship 0.456
2.2.15 General cargo ship 107.48 DWT of the ship 0.216
2.2.16 LNG carrier 2,253.7 DWT of the ship 0.474
2.2.22 Refrigerated cargo carrier 227.01 DWT of the ship 0.244
2.2.26 Ro-ro cargo ship 1405.15 DWT of the ship 0.498
1686.17* DWT of the ship where DWT≤17,000*

17,000 where DWT > 17,000*

2.2.27 Ro-ro cargo ship (vehicle carrier) (DWT/GT)-0.7 780.36 where DWT/GT < 0.3

1,812.63 where DWT/GT ≥ 0.3

DWT of the ship 0.471
2.2.28 Ro-ro passenger ship 752.16 DWT of the ship 0.381
902.59* DWT of the ship where DWT≤10,000*

10,000 where DWT > 10,000*

2.2.29 Tanker 1,218.80 DWT of the ship 0.488
  • * to be used from phase 2 and thereafter.

 4 If the design of a ship allows it to fall into more than one of the ship type definitions specified in table 2, the required EEDI for the ship shall be the most stringent (the lowest) required EEDI.

 5 For each ship to which this regulation applies, the installed propulsion power shall not be less than the propulsion power needed to maintain the manoeuvrability of the ship under adverse conditions as defined in the guidelines to be developed by the Organization.footnote

 6 At the beginning of phase 1 and at the midpoint of phase 2, the Organization shall review the status of technological developments and, if proven necessary, amend the time periods, the EEDI reference line parameters for relevant ship types and reduction rates set out in this regulation.


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