New Technical Approach to Classification of Anchor Handling and Diving Support Vessels A. DEVADAS RINA MUMBAI.

New Technical Approach to Classification of Anchor Handling

and Diving Support Vessels

A. DEVADAS RINA MUMBAI

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The offshore sector expansion in the last years is linked to:

• world increasing demand of petroleum and natural gas

• deep waters exploitations > increasing of drilling and production and storage units demand

OIL & GAS sector trend

* Clarkson research Service (Mar-13)

General Market Overview

* Clarkson research Service (Mar-13)

AHTS and MPV Orderbook trend

Contracts by typeNumber of Contracts Contracting trends

2006 2007 2008 2009 2010 2011 2012 2013

AHTS >12000 bhp 20 17 19 41 46 20 20 7 UP BY… 40%

AHTS 8-12000 bhp 10 17 28 39 33 26 24 4 DOWN BY… -33%

AHTS <8000 bhp 56 68 93 149 123 112 69 6 DOWN BY… -65%

AHT 25 32 35 57 54 36 12 1 DOWN BY… -67%

Anchor Handling

Increase of depth where the O&G industry is moving to

Increase of anchoring system weight and more critical operative conditions

The AHTS stability become a parameter to keep strictly monitored

Harsher environmental conditions

Technical Challenges

Roller strength verification Winch arrangement and control

Visibility from bridge deck Hull connections verification

“Anchor Handling” is specifically designed for support to off-shore and wind farm units: roller strength, winch arrangement and control, hull connections visibility from bridge deck

Anchor Handling

RINA Approach

Additional notation showing the capability of tugs and supply vessels to handle anchors safely. Main characteristics:

specific stability criteria for compliance with Norwegian Maritime Authority

Circular – Series V RSV 04-2008 based on extensive studies carried out

by RINA on the effects of the forces transmitted by the anchor handling wire rope

this additional class notation covers also the equipment to be fitted on board, to allow the Master greater control of the ship stability

Anchor Handling STAB

RINA Approach

* Clarkson research Service (Mar-13)

MPV Orderbook trend

Contracts by typeNumber of Contracts Contracting trends

2006 2007 2008 2009 2010 2011 2012 2013

Construction Vessel 89 96 69 80 43 46 24

Lift Boats/Installation 16 15 19 12 18 8 12 1 DOWN BY… -67%

Accommodation Units 11 27 36 5 14 9 14 2 DOWN BY… -43%

MSV/DSV/Rov Support 59 61 33 2 20 37 31 11 UP BY… 42%

Offshore Dredgers 3 8 12 6 15 1

Technical Challenges

This situation generate an high complexity of the system and relative certification scheme

DIVING SUPPORT VESSELS

Maintaining position during diving operations

Stability during handling of diving equipment

Hull structural arrangements related to the diving system

Monitoring and electrical system to support the diving operations

2 type of system, Surface (up to 50 m) and Saturation (from 50 to 500m) have different characteristics which have to be dealt with in different ways:

Diving Support Vessels

The additional class notation DIVINGSUPPORT is assigned to ships equipped with a diving system certified by RINA. maintaining position during diving operations stability during handling of diving equipment hull structural arrangements related to the diving system electrical system to support the diving operations

RINA Approach

A new concept of classification is being developed on the basis of the requests of the Makers, Contractors and Associations (e.g. IMCA) of this sector1. ensure the highest flexibility in the construction, exchange,

replacements of the diving system components 2. keep the history of use and maintenance of each

component3. avoid that ‘unknown’ components are installed in the diving

systems

Three levels of Class certificates

A component based certification approach

main components can be combined in various arrangements, in order to constitute a primary system (Diving System)

the system can then be dismantled and re-combined, substituting or adding some components, for other campaigns

the three levels of certificates will grant the possibility to exchange/replace components (main or basic) on a primary system without affecting its Class Certificate.

RINA Approach

each component (principal, main and basic) is provided with a proper certificate of Class, which follows the component during its life, including the lay up periods

this system guarantees the execution of the necessary periodical surveys, defined by the Manufacturer and approved by Class

RINA Approach

RINA Rules for OSV

Stand alone classification rules for

OSV

Expected issue date: July 2013

Portfolio of dedicated additional

Class Notations and services to

increase the Class value

Full information support through

Leonardo INFO and EASY

RINA Aproach

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