1 MVR Nandgi Jan25
1 MVR Nandgi Jan25
Marine Vessels
January 2025
RULES FOR BUILDING AND CLASSING
MARINE VESSELS
JANUARY 2025
NOTICES AND
GENERAL INFORMATION
CONTENTS
Introduction........................................................................................................................ 1
TABLE 1 Applicable Editions of Parts Comprising January 2025
Marine Vessel Rules ................................................................. 4
TABLE 2 Division and Numbering of Rules ............................................. 5
Rule Change Notice (2025) ............................................................................................... 6
TABLE 3 Summary of Changes from the July 2024 Rules ...................... 6
ABS RULES FOR BUILDING AND CLASSING MARINE VESSELS . 2025 iii
Notices and General Information
Introduction
1. The 2025 edition of the Rules for Building and Classing Marine Vessels consists of the Parts as
shown in Table 1. Reference is made in these Rules to the following generic Rules:
a) Rules for Conditions of Classification (Part 1A) includes consolidated requirements for
“Classification” applicable to all types of and sizes of vessels, barges and specific
shipboard arrangements/systems, etc., except for those in offshore service, as specified in
the Foreword to Part 1A. Additional specific requirements are contained in Chapter 5 of
Part 1A.
b) Rules for Alternative Arrangements, Novel Concepts and New Technologies (Part 1D)
introduces a procedure for acceptance of alternative arrangements, novel concepts, and
new technologies based on Goals and Functional Requirements, including a consolidated
list of Tier 1 Goals.
c) Rules for Materials and Welding (Part 2) contains materials requirements common to
ABS-classed vessels, other marine structures and their associated machinery, including
steel, aluminum, and FRP materials.
d) Rules for Survey After Construction (Part 7) contains consolidated requirements for
“Surveys After Construction” applicable to all types and sizes of vessels, barges and
specific shipboard arrangements/systems, etc., as specified in Part 7, Chapter 1, Section 1.
2. The numbering system applied in the Rules is shown in Table 2.
3. The primary changes from the July 2024 Rules are identified and listed in Table 3. The effective
date of the indicated Rule Changes is 1 January 2025, unless specifically indicated otherwise.
For certain changes that have a major impact on shipyards, designers and vendors, ABS has
instituted a two-year Rule cycle to give the industry more time to prepare for these changes. The
text of these changes will appear in a box along with the effective date just under the existing Rule
requirement.
4. In association with the harmonization of the Common Structural Rules (CSR) for Bulk Carriers
and Oil Tankers, on 1 July 2015, the three Sub-parts, 5A, 5B, and 5C, of Part 5 of the Rules for
Building and Classing Marine Vessels are as follows:
Contents
Part 5A: General Hull Requirements (IACS CSR Part 1)
Part 5B: Ship Types (IACS CSR Part 2)
Part 5C: This Part is divided into two separate booklets as follows:
Chapters 1 to 6: Tankers and Bulk Carriers not covered by Part 5A
and Part 5B and Container Carriers
Chapters 7 to 22: Passenger Vessels, Liquefied Gas Carriers, Chemical
Carriers, Vessels Intended to Carry Vehicles, Vessels
Intended to Carry Liquid Cargoes in Bulk (other than
Oil or Chemical), Membrane Tank LNG Carriers,
Vessels Using Gases or other Low-Flashpoint Fuels,
Fire Fighting Vessels, Oil Recovery Vessels, Escort
Vessels, Vessels Under 90 m (295 ft) Intended for
Towing, Fishing Vessels, Box-Shaped Bulk Carriers,
General Dry Cargo Vessels, Heavy Lift Ships, and
Anchor Handling Vessels.
Part 5D: Offshore Support Vessels for Specialized Services
Application – Oil Tankers
The structural requirements in Part 5A, Pt 1 and Part 5B, Pt 2, Ch 2 of the Rules are
applicable for double hull oil tankers of 150 m in length and upward, with structural
arrangements as specified in Part 5A, Pt 1, Ch 1, Sec 1, [1.3].
For oil tankers with structural arrangements not covered by Part 5A, Pt 1 and Part 5B,
Pt 2, Ch 2, the requirements in Part 5C, Chapters 1 or 2, are to be complied with.
Application – Bulk Carriers
The structural requirements in Part 5A, Pt 1 and Part 5B, Pt 2, Ch 1 of the Rules are
applicable for single side skin and double side skin bulk carriers of 90m in length and
upward, with structural arrangements as specified in Part 5A, Pt 1, Ch 1, Sec 1, [1.2].
For vessels intended to carry ore or bulk cargoes, other than the single side skin or double
side skin bulk carriers of 90 m in length and upward with structural arrangements as
specified in Part 5A, Pt 1 and Part 5B, Pt 2, Ch 1, the requirements in Part 5C, Chapters 3
or 4 are to be complied with.
Application – ABS Construction Monitoring Program
These compulsory requirements for CSR notation are specified in Part 5C, Appendix 1,
Section 2.
Application – Onboard Systems for Oil Tankers and Bulk Carriers
The onboard systems for all tankers are to comply with the requirements of Part 5C,
Chapter 2, Section 3, and for all bulk carriers are to comply with the requirements of Part
5C, Chapter 3, Section 7 of the Rules.
Application – References
Other Parts of the ABS Rules that are referenced within Part 5A, 5B, 5C, and 5D are also
to be applied.
The following flow chart indicates the application of the Rules and typical Class Notations for tanker and bulk
carrier vessels, of which arrangements and scantlings are in full compliance with the Rules:
Vessels Intended to Carry Oil in Bulk Vessels Intended to Carry Ore or Bulk Cargoes
No No
L ≥ 150 m? L ≥ 90 m?
Yes Yes
Yes Yes
Part 5A and Part 5B, Chapter 2: Part 5A and Part 5B, Chapter 1:
Common Structural Rules Common Structural Rules
and and
Part 5C, Appendix 1, Section 2 Part 5C, Appendix 1, Section 2
Part 5C, Chapter 2, Section 3: Part 5C, Chapter 3, Section 7:
ABS Marine Vessel Rules ABS Marine Vessel Rules
TABLE 1
Applicable Editions of Parts Comprising January 2025 Marine Vessel Rules
Notices and General Information January 2025
Part 1A: Rules for Conditions of Classification January 2025
Part 1D: Rules for Alternative Arrangements, Novel Concepts and January 2024
New Technologies
Part 2: Rules for Materials and Welding January 2025
Rules for Testing and Certification of Materials
Rules for Welding and Fabrication
Part 3: Hull Construction and Equipment January 2025
Part 4: Vessel Systems and Machinery January 2025
Part 5A: Specific Vessel Types January 2025
General Hull Requirements (IACS CSR Part 1)
Part 5B: Specific Vessel Types January 2025
Ship Types (IACS CSR Part 2)
Part 5C: Specific Vessel Types January 2025
Chapter 1 General Hull Requirements for
SafeHull Vessels (New)
Chapter 2 Oil Carriers
Chapter 3 & 4 Bulk Carriers
Chapter 5 & 6 Container Carriers
Chapter 7 Passenger Carriers
Chapter 8 Liquefied Gas Carriers
Chapter 9 Chemical Carriers
Chapter 10 Vehicle Carriers
Chapter 11 Vessels Intended to Carry Liquid
Cargoes in Bulk (other than Oil or
Chemical)
Chapter 12 Liquefied Gas Carrier with Membrane
Tanks
Chapter 13 Vessels Using Gases or other Low-
Flashpoint Fuels
Chapter 14 Fire Fighting Vessels
Chapter 15 Oil Recovery Vessels
Chapter 16 Escort Vessels
Chapter 17 Vessels Under 90m (295 ft) Intended
for Towing
Chapter 18 Fishing Vessels
Chapter 19 Vessels Intended to Carry Bulk Cargoes
without Upper Wing Tanks and Lower
Wing Tanks
Chapter 20 General Dry Cargo Vessels
Chapter 21 Heavy Lift Ships
Chapter 22 Anchor Handling Vessels
Part 5D: Offshore Support Vessels for Specialized Services January 2025
Chapter 1 Vessels Intended for Offshore Support
Services
Chapter 2 Offshore Supply
Chapter 3 Anchor Handling and Towing
Chapter 4 Fire Fighting
Chapter 5 Diving and Remotely Operated
Vehicles (ROVs) Support
Chapter 6 Oil Spill Recovery
Chapter 7 Safety Standby Rescue
Chapter 8 Pipe Laying
Chapter 9 Heavy Lift
Chapter 10 Well Intervention
Chapter 11 Well Stimulation
Chapter 12 Well Test
Chapter 13 Escort
Chapter 14 Wind Turbine Installation, Maintenance
and Repair (Wind IMR)
Chapter 15 Cable Laying
Chapter 16 Subsea Services
Part 6: Specialized Items and Systems January 2025
Chapter 1 Strengthening for Navigation in Ice
Chapter 2 Refrigerated Cargo Vessels
Chapter 3 Exhaust Emission Abatement
Chapter 4 Low and High Voltage Shore
Connection
Chapter 5 Alternative Fuels
Chapter 6 Ballast Water Treatment (New)
Part 7: Rules for Survey After Construction January 2025
TABLE 2
Division and Numbering of Rules
Division Number
Part Part 1
Chapter Part 1, Chapter 1
Section Section 1-1-1
Subsection (see Note 1) 1-1-1/1
Paragraph (see Note 1) 1-1-1/1.1
Subparagraph 1-1-1/1.1.1
Item 1-1-1/1.1.1(a)
Subitem 1-1-1/1.1.1(a)i)
Appendix Appendix 1-1-A1 or Appendix 1-A1-1
Note:
1 An odd number (1, 3, 5, etc.) numbering system is used for the Rules. The purpose is to permit future insertions of
even-numbered paragraphs (2, 4, 6, etc.) of text and to avoid the necessity of having to renumber the existing text and
associated cross-references, as applicable, within the Rules and associated process instructions, check sheets, etc.