Offshore Service Vessel News Tcm109-415086

8/2/2019 Offshore Service Vessel News Tcm109-415086

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Lars Ekren & Ian Edwards

Offshore Service Vessels

A summary of the Changes in Phase I, March 2010


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Det Norske Veritas AS. All rights reserved.


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What are the main changes in Phase 1?

Introducing a market-oriented portfolio of products:-

- Modularised class notations for OSVs

- New Anchor Handling, Towing, Supply and AHTS

notations- Updated Tug notation

- Dynamic positioning systems; introduction of a newnotation series: DP

- New Fire Fighter I notations


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TODAY

Modularised class notations for OSVs

Ship Type Notations

- Supply Vessel Basic

- Supply Vessel Ship Type Notations

- Offshore Service Vessel- Offshore Service Vessel (ROBUST)- Additional Functional Notations

- Anchor Handling

- Towing

- Supply- AHTS

PROPOSAL


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Restructuring Ship Type Notations

General requirementsapplicable to all OSVs

Cargo Handling forplatform supply services

Enhanced strength

Supply Vessel Basic

Supply Vessel

Offshore Service Vessel

TODAY PROPOSAL

Supply

Offshore Service Vessel(ROBUST)

TugTug

Towing

Existing requirements:


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What are the consequences?

A typical AHTS previously with Tug and Supply VesselBasic

or Supply Vessel notations will be entitled to the followingnotations:

1A1 Offshore Service Vessel AHTSor; 1A1 Offshore Service Vessel (ROBUST) AHTS

A typical PSV previously with Supply Vessel Basic notation willbe entitled to the following notations:

1A1 Offshore Service Vessel SupplyUpon request from the Owner, existing vessels may be entitled

the new notations


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Introducing New Notations for OSVs

Anchor Handling

Objective:provide a design standard for safeand reliable towing and anchor handlingoperation

Application:Offshore service vessels intendedfor towing of floating objects in open watersand objects on sea bed in addition tosubsurface deployment and lifting ofanchoring equipment.

Towing

Objective:provide a design standard for safeand reliable towing operation

Application:Offshore service vessels intendedfor towing of floating objects in open waters.


7/12 Det Norske Veritas AS. All rights reserved.


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Introducing New Notations for OSVs

Supply

Objective:provide a design standard for safeand reliable platform supply to offshoreinstallations

Application:Offshore service vessels intendedfor platform supply services

AHTS

Objective:provide a design standard for safeand reliable towing and anchor handlingoperation and in addition, platform supply tooffshore installations

Application:Multipurpose Offshore ServiceVessels intended for towing of floatingobjects in open waters and objects on seabed, subsurface deployment and lifting ofanchoring equipment and platform supplyservices




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Scope of New OSV Notations

Hu

llAr

rang

ement&

Stre

ngth

System

s&Eq

uipm

ent

Stabilit

y&W

atertight

Inte

grity

Additio

nalS

treng

th

Towin

g&An

chor

Handlin

g

Equipm

ent

Supp

ortin

gStru

ctur

es&

Arrang

ements

AdditonalS

tability&W

atertigh

t

Inte

grity

Requirem

ents

Ca

rgoH

andlin

gAr

rang

ement&

Certific

atio

n

Offshore Service Vessel Offshore Service Vessel (ROBUST) Anchor Handling Towing Supply AHTS




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Updated Tug Notation

Tug is defined as a ship type notation,

while Towing is an additional notationrelated to Offshore Service Vessel

Tug notation will in most cases besuperfluous for a typical AHTS due tothe introduction of the new notations

The notation has been revised with the following main changes:

Updated testing requirements and bollard pull procedureDocumentation requirements have been revised

Towing arrangement and stability requirements have been revised




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Dynamic Positioning Systems

DNV is developing new DP- notations customised for markets where the

DYNPOS- standard is considered beyond the actual needs

The new DP- notations will also be based on the principles in IMOMSC/Circ. 645 Guidelines for vessels with dynamic positioning systems

The existing DYNPOS- notations are unchanged

The DYNPOS- notations have additional requirements as compared to the

DP- notations

Class entries to the DYNPOS- series:

- Documentation review, performance testing and FMEA failure testing

Class entries to the DP- series:

- Based on a corresponding, valid and maintained DP class notation, from thelosing society




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Dynamic Positioning Systems

IMO equipment class 3DP-3DYNPOS-AUTRO

IMO equipment class 2DP-2DYNPOS-AUTR

IMO equipment class 1DP-1DYNPOS-AUT

Not applicableDP-0DYNPOS-AUTS

DP-seriesDYNPOS-series

IMO equipment class

DNV class notations

IMO equipment class 3DP-3DYNPOS-AUTRO

IMO equipment class 2DP-2DYNPOS-AUTR

IMO equipment class 1DP-1DYNPOS-AUT

Not applicableDP-0DYNPOS-AUTS

DP-seriesDYNPOS-series

IMO equipment class

DNV class notations

New Notation Structure, from July 2010




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Safeguarding life, propertyand the environment

www.dnv.com

Offshore Service Vessel News Tcm109-415086

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