Enhance the Technical Specification for New build OSVs : Owners Perspective

www.ariesmar.com

AJITH P J

Enhance the Technical Specification for OSV’s

FOCUS AREA:

PARAMETERS TO BE CONSIDERED IN NEW DESIGN OF A TYPICAL OSV FOR MIDDLE EAST

.

Relevance of Specification & Design Elements:

Present Generation OSV’s

CHANGES IN CRITERIA–RULE & REGULATIONS:CLASS + FIELD OPERATORS

Operational & Technological Aspects

Safety

Comfort

Promptness

Environmental Parameters

Risk Based Assessment on activities

.

Worldwide OSV Utilization Rates: Younger Vs Older Designs

OSV’s-MAJOR CATEGORIES BASED ON DUTIES

OFFSHORE SUPPORT DUTIES

Supply

Personnel,Consumables,Equipment's

SUPPLY VESSEL

Rig Placement

Anchor Handling,Towing, Escort

AHTS

Sub Sea support

Construction,Maintenance,

Inspections

OCV/ROV/DSV

Protection

Fi Fi, Rescue,Survivor,Security

Oil Spill Recovery

SAFETY STANDBY/OIL RECOVERY

/RESCUE

MULTI PURPOSE OFFSHORE SUPPORT VESSEL

OSVs- Specific Class Notations on Demand in Middle East

Optional Notations : UWILD, MLC-ACCOM, HELIDK, HAB, DPS, CRC, BWT, ACC,ERRV

Notations assigned to reflect specialized Offshore service capabilitiesSupply Platform Supply

Supply-HNLS Supply-Hazardous and Noxious Liquid Substances

AH, TOW Anchor Handling and Towing

FFV 1, FFV 2, FFV 3 Firefighting

DSV AIR, DSV MIXED-GAS, DSV SAT, ROV Diving and ROV Support/DSV/ROV Capable

OSR-S, OSR-C Oil Spill Response/Recovery

SSR Safety Standby Rescue

Pipe Lay Pipe Laying

Heavy Lift Heavy Lift

WS Well Stimulation

ESCORT Escort

SPS Special Purpose

AMS Machinery and systems.

Multipurpose Vessel Concept

-Design to Extend vessel Functionality

MPSVs support Offshore Construction,Supply,Deep water

Testing,ROV,DSV,Safety,Storage,Security ,Accommodation ,Anchor Handling etc

MPSVS –SWISS KNIVES OF OFFSHORE BUSINESS

ESTABLISHED CONCEPT – CAREFUL APPROACH DURING DESIGN STAGE BY OWNER.

OSVs in Middle East: Primary Design Factors & Specification Elements

MANDATORY DESIGN COMPLIANCE AS PER PRESENT RULE REQUIREMENTS

SOLAS & MARPOL REGULATIONS

CARGO SECURING MANUAL

SPS COMPLIANCE

OSV CODE COMPLIANCE

STABILITY/DAMAGE STABILITY COMPLIANCE OF OSVS

CLASS-STRENGTH CALCULATIONS FOR BENDING MOMENT & SHEAR FORCE

LOCAL STRENGTHENING UNDER DECK FOR EQUIPMENTS,FOUNDATIONS AND SYSTEMS

New Build OSV Vessel-Proposed Design & Building Process Flow for Owner

STEP 1:PREPARE TECHNICAL SPECIFICATION,HULL FORM DESIGN & PRELIMINARY GA- COMPLYING ALL MPSV REQUIREMENT

STEP 2:SPLIT UP BUDGET FOR ESSENTIAL & FUTURE FITMENT OF EQUIPMENTS

STEP 3:PLAN APPROVAL BASED ON ALL MPSV FUNCTIONAL EQUIPMENT

STEP 4:HULL CONSTRUCTION ,FOUNDATIONS,PROVISION FOR PIPINGS,ELECTRICAL LOADS & COATING STANDARDS AS PER PLAN APPROVAL-CLASS REQUIREMENTS

STEP 5: ENSURE “PLUG & PLAY”PROVISION FOR FUTURE FITMENTS & MACHINERY

STEP 6:ADD ON CLASS NOTATIONS AS AND WHEN REQUIRED BY FITMENT OF MACHINERY& EQUIPMENTS IN DUE COURSE OF VESSEL OPERATIONS

Oil Recovery Safety Standby ERRV FI-FI Helideck DP

Supply Vessel Anchor handling/ towing Offshore Construction Vessel Diving Support Vessel

OSV Design Transition Elements: Basic Supply Vessel MPSVs

MPSV

RULES & REGULATIONS:COMPARISONBasic Supply vs New MPSV Design

Parameters Basic NewSize L-48-62m L-65-130

BHP 3000-12,000 5000 - 28000

DP None DP-2

Rule <90 m rule OSV Rule

BottomScantling Increase in Longitudinal. Frame sizesSide Shell Increase in thickness for impact loading

Bulkheads Same Same

DeckScantling

Actually –Decrease in ThicknessPractical-Increase based on more Deck strength rqmts

S.StructureScantling

Side shell thickness-ReducedF’cle Deck thickness-Increase

Accomodation 1.8 m clear height 2.03 m clear height-MLC

PARAMETERS:COMPARISONOld Specification Supply Vessel -Non Compliance Elements & Root Cause

Parameters Root Cause on possible mode for FailureIntact Stability

-Hull form slender as it was meant for shallow draft

-VCG not satisfactory during Crane and high equipment Loading since cranes used currently are of high lifting capacity and outreach.(A knuckle boom crane with a capacity of minimum 20 ton at 12m and certified for man riding required for offshore)

Damage Stability -Deterministic approach with side damage anywhere within transverse bulkheads.-Theoretically 2 compartment damage standard is applied which old designs may not satisfy,

PARAMETERS:COMPARISONOld Specification Supply Vessel -Non Compliance Elements & Root Cause

SPS Code - LSA/FFA Compliance difficulty- Bilge/Ballast/Fire piping(B/5) from side shell routing- Deterministic damage and D.B Damages.(if more passengers-Probabilistic

approach)- Fuel Tank protection from side shell- Tie 2 compliance for engines

Structural Modifications - No sufficient room for additional stiffening for pedestal and foundations- Existing scantling of the hull not satisfactory to take loads. Major rework- Extension of Hull to meet cargo tank capacities- Means for cargo securing limited

Compartment & Accom.Spaces - Offshore accommodation crew space requirements

- MLC 2006 regulations. Mainly Clear deck height and comfort- Berth Size : 198 cm x 80 cm(minimum)

Paramaters Root Cause on possible mode for Failure

PARAMETERS:COMPARISONOld Specification Supply Vessel -Non Compliance Elements & Root Cause

Paramaters Root Cause on possible mode for FailureAnchor Handling

- Implemented after disaster with the AHTS vessel “Bourbon Dolphin” capsize- Fail to meet Minimum residual stability during anchor handling

operations as well as other operations where vessels are subject to similar large external forces.

- Power availability issue due to limited capacity of engines for load sharing with DP.

Towing- Fail to meet Minimum residual stability during anchor handling

operations as well as other operations where vessels are subject to similar large external forces.

PARAMETERS:COMPARISONOld Specification Supply Vessel -Non Compliance Elements & Root Cause

Paramaters Root Cause on possible mode for Failure

Fi Fi- Difficulty in fixing Independent pumping and piping systems (supply of water and

foam monitors, water-spraying system and portable fire-fighting equipment); Water fire-fighting systems (number of pumps, monitors and characteristics as function of fifi class) &Fixed-foam fire-fighting systems;

Oil Recovery- No Segregation of spaces intended for retention of oil (cofferdams, tanks); settling &

accumulation tanks.

- Critical Definition of dangerous spaces (accumulation tanks, surrounding spaces, pump rooms, spaces with piping, deck areas, etc.) not possible

Rules & Regulation –Addl to be applied in SpecificationSpecial Category to Add Value & quality for ship

Item

Certification/ Documentation

Reason for Reference

Guidelines for Failure Modes & Effects Analyses (FMEAs), IMCA M 166-April2002

FMEA report by approved third party.

For DPS 2 notations Class will take care of the FMEA. But IMCA guide lines are also provided in the technical specification as a basic guide line for FMEA to control the outcome of FMEA report.

Guide for Coating Performance

standardsNotation: CPS

Generally Painting warranty by the Maker will suffice for this. But there is trend of providing CPS notation for vessels.This will help in class involvement providing the protective coating for Sea water Ballast tanks & cargo holds. Or A specific requirement of Complying with PSPC can be incorporated in the Technical specification - this will suffice for the requirement.

Notation (Automatic

Centralized Control Unmanned)

Notation: ACCU/ + ACCU (for system

Built under survey)

Unmanned machinery space requirements. Can reduce the manning and efficiency of the vessel. General trend is for Going for ACCU notation.

Guide For Crew Habitability on

Ships

Notation: HAB/ HAB+/ HAB ++

Additional requirement (Over & above MLC). Based on Market requirement. Noise & Vibration

. IMO Publication 978 Performance

Standard of Navigation Equipment

NA

Control the performance of navigation equipment's - General guidelines. Rely on reputed makers equipment's with class certificates which essentially deals with IMO publication. Or can be elaborated in the technical specification.

IMO Resolution A686 (17) Code on

Alarms and Indicators,

amended by Res. MSC. 39 (63)

NAControl the performance of Alarm & monitoring system - give a general guidelines on the system.

Rules & Regulation section in SpecificationSpecial Category Guidelines to Add Value & quality for ship

Item

Certification/ Documentatio

n

Reason for Reference

ISO 8861 Shipbuilding - Engine room ventilation in

Diesel Engine ships NA

Provided to ensure the quality of the system specifying minimum air change per hour. Generally provide over and above ISO specified values.

ISO 7547-2002 Ships and Marine Technology- Air-

conditioning and ventilation of

accommodation spaces

NAGenerally provided for ensuring the performance of the A/c system inside the accommodation space especially when dealing with new shipyards/ makers.

. ISO 8864, Air conditioning and

Ventilation of Wheelhouse onboard Ships

NA

This is provided for ensuring quality of performance of the A/c system for wheelhouse. Normally, elaborated in the specification. And wheelhouse always to be provided with stand by arrangements in the technical specifications.

. ISO 9943, Ventilation and air treatment of galleys

and pantries with cooking appliances

NAFor ensuring the performance of ventilation system in galleys. Also, can be elaborated in the technical specification as a more specific requirement.

International Life Saving Appliances Code (LSA

Code) NA Full compliance require based on the Number of persons on Board

International Code for Fire Safety Systems (FSS Code)

NA Full compliance require based on the Number of persons on Board

FIELD OPERATORS PARAMETERS-To be incorporatedADMA-OPCO,ARAMCO.Q.P REGULATIONS

PARAMETERS DESCRIPTION

Temperature Commonly used assumption for middle east: Consider the sea water temp. Max 36 0 C & min 10 0 C Ambient air temp. Max 50 0 C & min 5 0 C

Transverse Thruster Performance

The vessel to be capable of side-stepping, at the operational even-keel draft in STILL WATER, of 2.75 knots average sideways movements with A maximum of ± 3º heading variation

Approved Maker List Owner to specific critical equipment to be used onboard with maker details than shipyard to propose.

OCIMF’s OVID-VIQ Compliance to be ensured as all oil majors seeking & referring to the same to offshore vessels inspection database before chartering.

“Crash Stop” Capability The vessel shall be capable of going from full ahead at 100% MCR to being stopped “dead in the water” within 40 seconds from time of the order

Maintain Station Criteria The vessel must be capable of maintaining station within five (5) horizontal meters of a discrete position in an environment with concurrent winds, seas and currents as follows:Wind: beaufort force 7, (up to 33kts – 17.1 m/s). Sea condition: sea state 4, “rough sea” (up to 8ft – 2.44 meters). Current: 2kts.

FIELD OPERATORS PARAMTERSADMA-OPCO,ARAMCO.Q.P REGULATIONS

PARAMETERS DESCRIPTION

Air Conditioning THE VESSEL SHALL BE CAPABLE OF MAINTAINING ALL OF ITS ACCOMMODATION, MESSING, BERTHING, RECREATIONAL AND INTERNAL NAVIGATING SPACES AT AN AIR TEMPERATURE OF 22 DEGREES CELSIUS AND 50% RELATIVE HUMIDITY IN AN OPERATING ENVIRONMENT OF 45 DEGREES CELSIUS, 90% RELATIVE HUMIDITY AT A SURFACE SEA TEMPERATURE OF 34 DEGREES CELSIUS.THE AIR-CONDITION UNIT(S) SHALL BE CAPABLE OF RE-CIRCULATION MODE WHILE MAINTAINING INTERIOR OVER-PRESSURE, I.E. IN CONNECTION WITH A H2S SITUATION, SANDSTORM, ETC. THE HVAC SHALL BE CONNECTED TO THE H2S/GAS DETECTION SYSTEM AND ENABLE AUTOMATICALLY START OF THE RECYCLING OF AIR

Deck Area VESSEL TO HAVE FREE AVAILABLE DECK SPACE SHALL BE MINIMUM 350 SQUARE METERS, WITH MINIMUM DECK LENGTH OF 30M AND WITH A MINIMUM DECK LOADING OF 5 TON PER SQUARE METER.

Loading Software VESSEL SHALL BE EQUIPPED WITH A LOAD MASTER COMPUTER, TANK DATA MONITORING SYSTEM OR AN EQUIVALENT PC BASED SYSTEM FOR DECK / UNDER DECK CARGO PLANNING AND STABILITY CALCULATIONS.

Personal Transfer MINIMUM FREEBOARD, ELSE WILL HAVE ISSUE WITH REACH TOWARDS BOAT LANDING PLATFORMS

Specific functions and Key technologies to be implemented:

ManeuveringTunnel Thrusters

Azimuth Thrusters

Retractable Thrusters

CPP Propellers

DP

MonitoringBridge watch

Launching systems

Safety Alarms

Security

Communication-all consoles

Deck HousesAccom –Hab,MLC

ERRV

Galley

Aft View

Helideck

Fi FiM

achi

nery

& E

quip

men

t's

Diving

FRC

Lifeboats

Service Tanks

ROV

CONCLUSION REMARKS

FUNCTIONAL ELEMENTS MUST BE ADDED TO A BASIC SUPPLY VESSEL COMPLYING CLASSIFICATION NOTATIONS & OPERATOR REQUIREMENT

HULL FORM PARAMETERS SHALL BE THE BASIC CRITERIA(STABILITY & STRENGTH) TO BE CHECKED IN ORDER TO ENSURE WORKS CAN BE EXECUTED ON A NEW BUILD VESSEL OPERATIONAL ASPECTS TO BE WELL DEFINED PRIOR TO COMMENCEMENT OF A NEW BUILD

www.ariesmar.com

AJITH P J