Code for the Construction and Equipment of Mobile Offshore Drilling Units, 2009 (MODU Code), 2010 Edition (I810E)

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Published Date

December 2010

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Code for the Construction and Equipment of Mobile Offshore Drilling Units, 2009 (MODU Code), 2010 Edition (I810E)

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The 2009 MODU Code provides an international standard for MODUs of new construction which will facilitate their international movement and operation and ensure a level of safety for such units and for personnel on board, equivalent to that required by the 1974 SOLAS Convention and the Protocol of 1988 relating to the International Convention on Load Lines, 1966, for conventional ships engaged on international voyages.

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The 2009 MODU Code presents a major revision of the 1989 MODU Code prompted by the need to update the provisions for helicopter facilities on MODUs following amendments by the ICAO Council in 2004. It also contains, amongst others:

  • Clarification of differing jurisdiction and control mechanisms of port and coastal States

  • Changes to the provisions for casualty investigations

  • New provisions for means of access and safe access to spaces

  • Inclusion of provisions for anti-fouling systems and ballast water management

  • Clarification and additional requirements for remotely operated doors

  • Provision of additional requirements for jacking systems

  • New requirements to enhance personnel safety

  • New requirements for hoisting equipment


For mobile offshore units constructed before 1 January 2012, the provisions of the 1989 MODU Code, as amended, should still be applied.


Resolution A.1023(26)


Chapter 1 – General

1.1 Purpose

1.2 Application

1.3 Definitions

1.4 Exemptions

1.5 Equivalents

1.6 Surveys and certification

1.7 Control

1.8 Casualties

1.9 Review of the Code

Chapter 2 – Construction, strength and materials

2.1 General

2.2 Access

2.3 Design loads

2.4 Structural analysis

2.5 Special considerations for surface units

2.6 Special considerations for self-elevating units

2.7 Special considerations for column-stabilized units

2.8 Towing arrangements

2.9 Fatigue analysis

2.10 Materials

2.11 Anti-fouling systems

2.12 Protective coatings of dedicated seawater ballast tanks

2.13 Construction portfolio

2.14 Welding

2.15 Testing

2.16 Drainage and sediment control

Chapter 3 – Subdivision, stability and freeboard

3.1 Inclining test

3.2 Righting moment and heeling moment curves

3.3 Intact stability criteria

3.4 Subdivision and damage stability

3.5 Extent of damage

3.6 Watertight integrity

3.7 Freeboard

Chapter 4 – Machinery installations for all types of units

4.1 General

4.2 Alternative design and arrangements

4.3 Machinery

4.4 Steam boilers and boiler feed systems

4.5 Steam pipe systems

4.6 Machinery controls

4.7 Air pressure systems

4.8 Arrangements for oil fuel, lubricating oil and other flammable oils

4.9 Bilge pumping arrangements

4.10 Ballast pumping arrangements on column-stabilized units

4.11 Protection against flooding

4.12 Anchoring arrangements for surface and column-stabilized units

4.13 Dynamic positioning systems

4.14 Elevating systems for self-elevating units

Chapter 5 – Electrical installations for all types of units

5.1 General

5.2 Alternative design and arrangements

5.3 Main source of electrical power

5.4 Emergency source of electrical power

5.5 Starting arrangements for emergency generators

5.6 Precautions against shock, fire and other hazards of electrical origin

5.7 Alarms and internal communication

Chapter 6 – Machinery and electrical installatons in hazardous areas for all types of units

6.1 Zones

6.2 Classification of hazardous areas

6.3 Openings, access and ventilation conditions affecting the extent of hazardous areas

6.4 Ventilation of hazardous spaces

6.5 Emergency conditions due to drilling operations

6.6 Electrical installations in hazardous areas

6.7 Machinery installations in hazardous areas

Chapter 7 – Machinery and electrical installations for self-propelled units

7.1 General

7.2 Means of going astern

7.3 Steam boilers and boiler feed systems

7.4 Machinery controls

7.5 Steering

7.6 Electric and electrohydraulic steering gear

7.7 Communication between the navigating bridge and the engine-room

7.8 Engineers’ alarm

7.9 Main source of electrical power

7.10 Emergency source of electrical power

Chapter 8 – Periodically unattended machinery spaces for all types of units

8.1 General

8.2 Application

8.3 Fire protection

8.4 Protection against flooding

8.5 Bridge control of propulsion machinery

8.6 Communication

8.7 Alarm system

8.8 Special provisions for machinery, boiler and electrical installations

8.9 Safety systems

Chapter 9 – Fire safety

9.1 Alternative design and arrangements

9.2 Structural fire protection

9.3 Protection of accommodation spaces, service spaces and control stations

9.4 Means of escape

9.5 Fire safety systems

9.6 Emergency escape breathing devices

9.7 Fire pumps, fire mains, hydrants and hoses

9.8 Fire-extinguishing arrangements in machinery spaces and in spaces containing fired processes

9.9 Portable fire extinguishers in accommodation, service and working spaces

9.10 Fire detection and alarm system

9.11 Flammable gas detection and alarm system

9.12 Hydrogen sulphide detection and alarm system

9.13 Fire-fighters’ outfits

9.14 Recharging of air cylinders

9.15 Arrangements in machinery and working spaces

9.16 Provisions for helicopter facilities

9.17 Storage of gas cylinders

9.18 Fire control plan

9.19 Operational readiness and maintenance

Chapter 10 – Life-saving appliances and equipment

10.1 General

10.2 Alternative design and arrangements

10.3 Survival craft

10.4 Survival craft muster and embarkation arrangements

10.5 Survival craft launching stations

10.6 Stowage of survival craft

10.7 Survival craft launching and recovery arrangements

10.8 Rescue boats

10.9 Stowage of rescue boats

10.10 Rescue boat embarkation, launching and recovery arrangements

10.11 Lifejackets

10.12 Immersion suits and anti-exposure suits

10.13 Lifebuoys

10.14 Radio life-saving appliances

10.15 Distress flares

10.16 Line-throwing appliances

10.17 Operating instructions

10.18 Operational readiness, maintenance and inspections

Chapter 11 – Radiocommunication and navigation

11.1 General

11.2 Training

11.3 Self-propelled units

11.4 Non-self-propelled units under tow

11.5 Units stationary at the site or engaged in drilling operations

11.6 Helicopter communications

11.7 Internal communications

11.8 Performance standards

11.9 Survey of the radio station

11.10 Navigation equipment

Chapter 12 – Lifting devices, personnel and pilot transfer

12.1 Cranes

12.2 Lifting and hoisting equipment

12.3 Personnel lifts

12.4 Personnel and pilot transfer

12.5 Drilling derricks

Chapter 13 – Helicopter facilities

13.1 General

13.2 Definitions

13.3 Construction

13.4 Arrangements

13.5 Visual aids

13.6 Motion sensing system

13.7 Exemptions

Chapter 14 – Operations

14.1 Operating manuals

14.2 Helicopter facilities

14.3 Material safety data sheets

14.4 Dangerous goods

14.5 Pollution prevention

14.6 Transfer of material, equipment or personnel

14.7 Diving systems

14.8 Safety of navigation

14.9 Emergency procedures

14.10 Emergency instructions

14.11 Training manual and onboard training aids

14.12 Practice musters and drills

14.13 Onboard training and instructions

14.14 Records

A​​s a specialized agency of the United Nations, IMO is the global standard-setting authority for the safety, security and environmental performance of international shipping. Its main role is to create a regulatory framework for the shipping industry that is fair and effective, universally adopted and universally implemented.  

In other words, its role is to create a level playing-field so that ship operators cannot address their financial issues by simply cutting corners and compromising on safety, security and environmental performance. This approach also encourages innovation and efficiency.

Shipping is a truly international industry, and it can only operate effectively if the regulations and standards are themselves agreed, adopted and implemented on an international basis. And IMO is the forum at which this process takes place.

Title: Code for the Construction and Equipment of Mobile Offshore Drilling Units, 2009 (MODU Code), 2010 Edition (I810E)
Number of Pages: 192
Product Code: MM1301K
ISBN: ISBN 13: 9789280115253, ISBN 10: 9280115251
Published Date: December 2010
Binding Format: Paperback
Book Height: 210 mm
Book Width: 150 mm
Book Spine: 9 mm
Weight: 0.40 kg
Author: IMO

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