Type 'B' Ships
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Assembly - IMO Resolution A.320(IX) Regulation Equivalent to Regulation 27 of the International Convention on Load Lines,1966 (Adopted on 12 November 1975)Amended by Resolution A.514(13) - Annex - Regulation Equivalent to Regulation 27 of the International Convention on Load Lines, 1966 - Type 'B' Ships

Type 'B' Ships

  (5) All ships which do not come within the provisions regarding Type 'A' ships in paragraphs (2) and (3) of this Regulation shall be considered as Type 'B' ships.

  (6) Type 'B' ships, which in position 1 have hatchways fitted with hatch covers which comply with the requirements of Regulation 15, other than paragraph (7), shall be assigned freeboards based upon the values given in Table B of Regulation 28, increased by the values given in the following table:

  (7) Type 'B' ships, which in position 1 have hatchways fitted with hatch covers complying with the requirements of Regulations 15(7) or 16, shall, except as provided in paragraphs (8) to (13) inclusive of this Regulation, be assigned freeboards based on Table B of Regulation 28.

  (8) Any Type 'B' ship of over 100 metres (328 feet) in length may be assigned freeboards less than those required under paragraph (7) of this Regulation, provided that, in relation to the amount of reduction granted, the Administration is satisfied that:

  • (a) the measures provided for the protection of the crew are adequate;

  • (b) the freeing arrangements are adequate;

  • (c) the covers in positions 1 and 2 comply with the provisions of Regulation 16 and have adequate strength, special care being given to their sealing and securing arrangements; and

  • (d) the ship, when loaded to its summer load water-line, shall be able to withstand the flooding of any compartment or compartments, with an assumed permeability of 0.95, consequent upon the damage assumptions specified in paragraph (12) of this Regulation, and shall remain afloat in a satisfactory condition of equilibrium as specified in paragraph (13) of this Regulation. In such a ship, if over 150 metres (492 feet) in length, the machinery space shall be treated as a floodable compartment, but with a permeability of 0.85.

  (9) In calculating the freeboards for Type 'B' ships which comply with the requirements of paragraphs (8), (11), (12) and (13) of this Regulation, the values from Table B of Regulation 28 shall not be reduced by more than 60 per cent of the difference between the 'B' and 'A' tabular values for the appropriate ship lengths.

  (10)

  • (a) The reduction in tabular freeboard allowed under paragraph (9) of this Regulation may be increased up to the total difference between the values in Table A and those in Table B of Regulation 28 on condition that the ship complies with the requirements of:

    • (i) Regulation 26 other than paragraph (4) as if it were a Type 'A' ship;

    • (ii) paragraphs (8), (11) and (13) of this Regulation; and

    • (iii) paragraph (12) of this Regulation, provided that throughout the length of the ship any one transverse bulkhead will be assumed to be damaged, such that two adjacent fore and aft compartments shall be flooded simultaneously, except that such damage will not apply to the boundary bulkheads of a machinery space.

  • (b) In such a ship, if over 150 metres (492 feet) in length, the machinery space shall be treated as a floodable compartment, but with a permeability of 0.85.


Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.