Single Point Mooring Maintenance and Operations Guide (SMOG) - Third Edition

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Number of Pages:
Book Height:
300 mm
Book Width:
210 mm
0.7 kg
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This is an industry guide providing technical recommendations and guidance for the operation and maintenance of single point moorings (SPM).

This industry guide illustrates the types of single point mooring and explains their key structures and functions.

It looks at each stage of SPM operation, including pre-arrival procedures, tanker berthing and mooring, hose connection, cargo transfer, disconnection and departure.

Detailed guidance is provided on inspection and maintenance and there are checklists covering pre-berthing, lubrication and inspection of key structures. There is also guidance on hoses, covering handling, storage, inspection and testing.

Section one

Description of single point moorings

1.1 Catenary anchor leg mooring buoys

1.2 Single anchor leg mooring buoy

Section two

Design of single point moorings

2.1 General design considerations

2.2 Site selection and layout

2.3 Mooring load transfer system and load analysis

2.4 Petroleum cargo transfer system

2.5 Single point mooring buoy design

2.6 Hose system design

2.7 Pipeline end manifold

Section three

Operation of single point moorings

3.1 Management of safety, occupational health and security

3.2 Qualifications and training

3.3 Pre-arrival procedures

3.4 Environmental operating limits

3.5 Personnel and equipment transfer between support vessel and tanker

3.6 Tanker berthing and mooring

3.7 Connecting rail hoses

3.8 Operations of tankers in berths

3.9 Cargo transfer

3.10 Disconnecting hoses

3.11 Departure from the single point mooring

Section four

Inspection and maintenance of single point moorings

4.1 Inspection and maintenance principles

4.2 General precautions

4.3 Inspection and maintenance schedules

4.4 Mooring system

4.5 Lifting equipment

4.6 Spares policy

4.7 Line flushing operations

Section five

Handling, storage, testing and inspection of hoses at single point moorings

5.1 Hose lifting and storage

5.2 Hose string assembly and handling

5.3 Hose service life

5.4 Guidance following overpressure and accidents

5.5 Hose inspection and testing requirements

5.6 Inspection and testing of hose strings in-situ

5.7 Testing hoses on shore

5.8 Destructive testing of hoses after retirement

5.9 Hose ancillary equipment


Appendix A: The Elements of MTMSA Applied to SPM Management

Appendix B: Calculating the hose lift weight

Appendix C: Forecastle watchman guide

Appendix D: Support facilities for single point moorings

D1 Maintenance support vessels

D1.1 Mooring launches

D1.2 Multipurpose support and maintenance vessels

D2 Use of tugs in operational support

D2.1 Use of tugs for mooring and unmooring

D3 Diving services

D3.1 Terminal organisation and responsibilities for diving


The Oil Companies International Marine Forum (OCIMF) is a voluntary association of oil companies with an interest in the shipment and terminalling of crude oil, oil products, petrochemicals and gas. OCIMF focuses exclusively on preventing harm to people and the environment by promoting best practice in the design, construction and operation of tankers, barges and offshore vessels and their interfaces with terminals. Learn more at:

Number of Pages:
Binding Format:
Book Height:
300 mm
Book Width:
210 mm
0.7 kg

Oil Companies International Marine Forum