New Technical Approach to
Classification of Anchor Handling
and Diving Support Vessels
A. DEVADAS
RINA
RINA MUMBAI
GROUP
making the best together
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General Market Overview
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
* Clarkson research Service (Mar-13)
OIL & GAS sector trend
Contracts by type
Number 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%
* Clarkson research Service (Mar-13)
AHTS and MPV Orderbook trend
Anchor Handling
Harsher environmental
conditions
Increase of depth where the
O&G industry is moving to
Increase of anchoring system weight
and more critical operative conditions
Roller strength verification
Winch arrangement and control
Visibility from bridge deck
Hull connections verification
The AHTS stability become a parameter to keep strictly monitored
Technical Challenges
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GROUP
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Anchor Handling
“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
RINA Approach
Anchor Handling STAB
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
RINA Approach
Contracts by type
Number 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
* Clarkson research Service (Mar-13)
MPV Orderbook trend
DIVING SUPPORT VESSELS
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:
Maintaining position
during diving operations
Monitoring and electrical system
to support the diving operations
Stability during handling
of diving equipment
Hull structural arrangements
related to the diving system
This situation generate an high complexity of
the system and relative certification scheme
Technical Challenges
RINA
GROUP
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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
RINA
GROUP
making the best together
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 sector
1.
2.
3.
ensure the highest flexibility in the construction, exchange,
replacements of the diving system components
keep the history of use and maintenance of each component
avoid that ‘unknown’ components are installed in the diving
systems
Three levels of Class certificates
A component based
certification approach
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GROUP
making the best together



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
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GROUP
making the best together


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
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GROUP
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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
SHIP NAME
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Thanks for your kind attention
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GROUP
making the best together