“Changing Industry Demands Redesign the OSV’s” 1 This paper was first presented at the “ 4 th International Conference on Technology and Operation of Offshore Support Vessels OSV Singapore 2011 organised by The Joint Branch of the Royal Institution of Naval Architects and The Institute of Marine Engineering, Science & Technology (Singapore), The Centre for Offshore Research & Engineering, National University of Singapore, and Newcastle University Marine International, Singapore.

INTRODUCTION Deeper Waters, newer HazardsHarsher environmentLarger Rig mooring equipmentExisting generation of OSV’sCrashing into platformsBourbon Dolphin 2

NEW RULES AND REGULATIONS OSV’s carry Noxious Liquids, chemicals, Drill cuttings > 100 personnel on board, SPS Code Dynamic Position Keeping Probabilistic Damage Stability Crew Comfort Environmental features High Capex costs – more than a VLCC 3

ANCHOR HANDLING Existing AH Tugs 150T – 200T BP. Deeper Waters, Larger Rigs Require BP > 300 Ton Winches > 600 Ton Brake Capacity > BHP Robotic AH Cranes ARF to land large anchors on deck 4

ANCHOR HANDLING 5

1 |The Supply Market 22 May TERM RATES - AHTS

TRANSPARENT BOLLARD PULL BOURBON DOLPHIN DISASTER Lack of Stability Overstated BP 7

BOURBON DOLPHIN 8

SUPPLY SHIPS Drilling Fluid TechnologyWaste cuttings backloadsHydrogen Sulphide 9

10 Supply

1 |The Supply Market 22 May TERM RATES - PSV

SPS CODE Subsea Construction and Maintenance Diving Support Pipe Laying Seismic Research and Training Well Intervention  200 personnel Need higher standard of Safety 12

CREW COMFORT Larger number of crew Demanding work Limit Noise and Vibration levels Natural Light, Indoor Climate Recreation rooms, Gyms, Min. rest hours 13

DYNAMIC POSITIONING Deeper waters subsea pipes no anchor mooring DP2 more common requirementPremium on DP vesselsDP3 not mandatedDiving vessels opt for DP3 14

FUEL CONSUMPTION Charterers look for fuel efficiency Innovative Hull and Propulsion Designs X-Bow Hybrid combination of Diesel Mechanical and PTI Depends on operational profile Long voyages of supply vessel favor Hybrid 15

AH needs high BP -Diesel mechanical straight shaft Diesel Hybrid Supply vessels need less power but economic steaming Diesel mechanical and Hybrid have nearly similar consumption Low Load Longer steaming between platforms Favor Hybrid savings 500T per year FUEL CONSUMPTION 16

FUEL CONSUMPTION 17

FUEL CONSUMPTION 18

FUEL CONSUMPTION 19

FUEL CONSUMPTION 20

21 FUEL CONSUMPTION

Hybrid propulsion suited for longer voyages, reduce SOx, Nox. LNG will also reduce Nox, Sox, but storage costs CLEAN notation imposed by Authorities GREEN 22 GREEN TECHNOLOGY

25 THANK YOU