DNV-OS-H101: Marine Operations, General

1 offshore STANDARDDET NORSKE VERITAS ASThe electronic pdf version of this document found through is the officially binding versionDNV-OS-H101 Marine operations , GeneralOCTOBER 2011 Det Norske Veritas AS October 2011 Any comments may be sent by e-mail to subscription orders or information about subscription terms, please use Typesetting (Adobe Frame Maker) by Det Norske VeritasThis service document has been prepared based on available knowledge, technology and/or information at the time of issuance of this document, and is believed to reflect the best ofcontemporary technology.

2 The use of this document by others than DNV is at the user's sole risk. DNV does not accept any liability or responsibility for loss or damages resulting fromany use of this NORSKE VERITAS (DNV) is an autonomous and independent foundation with the objectives of safeguarding life,property and the environment, at sea and onshore. DNV undertakes classification, certification, and other verification andconsultancy services relating to quality of ships, offshore units and installations, and onshore industries worldwide, andcarries out research in relation to these service documents consist of amongst other the following types of documents: Service Specifications.

3 Procedual requirements. Standards. Technical requirements. Recommended Practices. Standards and Recommended Practices are offered within the following areas:A) Qualification, Quality and Safety MethodologyB) Materials TechnologyC) StructuresD) SystemsE) Special FacilitiesF) Pipelines and RisersG) Asset OperationH) Marine OperationsJ) Cleaner EnergyO) Subsea SystemsDET NORSKE VERITAS AS offshore Standard DNV-OS-H101, October 2011 Contents Page 3 CONTENTSSec. 1 Introduction .. 6A. Objectives of the Standard .. 6A 100 General .. 6A 200 Safety levels.

4 6A 300 Alternative methods .. 6B. Application .. 6B 100 General .. 6B 200 Conditions for use .. 6B 300 Complementary standards and 7C. References .. 7C 100 Numbering and cross references .. 7C 200 Normative references .. 7C 300 Informative references .. 8D. 8D 100 Verbal forms .. 8D 9D 300 Symbols and Abbreviations .. 10 Sec. 2 Planning .. 12A. Planning Principles .. 12A 100 Philosophy .. 12A 200 Type of operation .. 12A 300 New technology .. 12A 400 Contingency planning .. 12A 500 Planning and design sequence .. 12A 600 Design basis and design brief .. 13B.

5 Documentation .. 13B 100 General .. 13B 200 Documentation 14B 300 Documentation quality and schedule .. 14B 400 Input documentation .. 14B 500 Output 14C. Risk Management .. 15C 100 General .. 15C 200 Hazard identification activities .. 15C 300 Risk reducing 15C 4003rd Party Verification and Marine Warranty Survey .. 16 Sec. 3 Environmental Conditions .. 17A. General .. 17A 100 Other codes .. 17A 200 Environmental conditions .. 17A 300 Characteristic 17A 400 Environmental statistics .. 18A 500 Seasonal variations .. 18B. Wind Conditions .. 18B 100 Mean wind period.

6 18B 200 Characteristic wind velocity .. 19B 300 Weather restricted operations .. 20B 400 Effect of height and mean wind 20B 500 Gust wind .. 20B 20C. Wave 21C 100 Wind seas and 21C 200 Design 21C 300 Weather restricted operations .. 21C 400 Unrestricted operations , General .. 21C 500 Unrestricted, characteristic waves .. 21C 600 Unrestricted, alternative method .. 22C 700 Design wave 23 DET NORSKE VERITAS ASOffshore Standard DNV-OS-H101, October 2011 Page 4 ContentsC 800 Design spectra (stochastic) method .. 24C 900 Short crested sea .. 25C 1000 Swell.

7 25D. Current and Tide 25D 100 Current .. 25D 200 Tide .. 27 Sec. 4 Operational Requirements .. 28A. General .. 28A 28B. Operation- and Design Criteria .. 28B 100 Type of operation .. 28B 200 Operation reference period - 28B 300 Planned operation period - 28B 400 Estimated contingency time - 29B 500 Weather restricted operations .. 29B 600 Operational limiting criteria .. 30B 700 Forecasted- and monitored operational limits, Alpha factor .. 31B 800 Unrestricted operations .. 33C. Weather 33C 100 General .. 33C 200 Weather forecast levels .. 34C 300 Accept criteria.

8 35D. Monitoring .. 35D 100 General .. 35D 200 Environmental conditions .. 35D 300 Alpha factor related 36D 400 Tide monitoring .. 36D 500 Monitoring procedure .. 36E. Organisation .. 36E 100 Organisation and responsibility .. 36E 200 Familiarisation and briefing .. 37E 300 Communication and reporting .. 37E 400 Shift plan .. 37F. Surveys and Testing .. 37F 100 General .. 37F 200 Test program .. 38F 300 Equipment and 38F 400 Systems .. 38F 38G. Documentation on 38G 100 General .. 38G 200 Marine operation 38G 300 Operation 39 Sec. 5 Stability Requirements.

9 40A. General 40A 100 Stability and reserve buoyancy .. 40A 200 Temporary closing elements .. 40A 300 Watertight integrity .. 40A 400 Stability calculations .. 40A 500 Inclining tests .. 41B. Barge Transports .. 41B 100 Safety against entry of 41B 200 Intact stability 41B 300 Single barge damage stability requirements .. 42B 400 Multi barge damage stability 43C. Self Floating 43C 100 General .. 43C 200 Intact stability 44C 300 Damage stability requirements .. 44D. Special 44D 100 Dynamic effects .. 44 DET NORSKE VERITAS AS offshore Standard DNV-OS-H101, October 2011 Contents Page 5D 200 Stability during loadout operations .

10 44D 300 Partly completed vessels .. 44 Sec. 6 Systems, Equipment and Vessels .. 45A. System and Equipment Design .. 45A 100 General .. 45A 200 Back-up .. 45B. Mooring Systems .. 46B 100 General .. 46B 200 ULS conditions .. 46B 300 ALS conditions .. 47B 400 FLS conditions .. 47B 500 Mooring line 48B 600 Fenders and Tugs .. 48B 700 Mooring attachment points .. 48B 800 Onshore bollards .. 49B 900 Anchors .. 50C. Guiding and Positioning Systems .. 50C 100 General .. 50C 200 Characteristic loads .. 51C 300 Design 51C 400 ALS conditions .. 51D. Vessels .. 51D 100 General .