VIKING NEPTUN
Cable Lay Vessel(SALT 301 OCV)
Owner: DEME NV · Operator: Eidesvik Offshore
CLVOperational
NODP3Helideck
NODP3Helideck
Key Specifications
Design Class
SALT 301 OCV
Cable Capacity
12,500t
ROVs
2
Transit Speed
15 knots
DP / Thrusters
DP3 (15.0 MW)
Year Built
2015 (upgraded 2023)
Emissions
ZERT 1 (Hybrid)
Depth Regime
Offshore
SALT 301 offshore construction / installation vessel of about 145.6 m LOA, built at Kleven Verft in Ulsteinvik, Norway, with an unobstructed cargo deck of approx. 2,600 m² and deck load capacity of 9,200 t, a 400 t active heave compensated knuckle-boom crane, helideck (D-value 20.88 m), DP3 capability and a below-deck 4,500 t cable turntable; under DEME’s ownership the vessel is being used for offshore wind cable installation, with plans to add a second large-capacity cable turntable on deck.
Identification
NameVIKING NEPTUN
Other Names—
Design ClassSALT 301 OCV
CategoryCable Lay Vessel
StatusOperational
IMO Number9664902
MMSI258789000
Call SignLAYH7
Flag StateNorway
NorwayClass NotationDNV-GL +1A1 ICE-1B SPS COMF-V(2)C(3) HELDK-SH CRANE DEICE E0 DYNPOS-AUTRO NAUT-OSV(A) CLEAN DESIGN DK(+) BIS TMON
Dimensions
Length Overall145.6 m
Breadth31 m
Depth13 m
Max Draft9.02 m
Gross Tonnage19,760 GT
Net Tonnage5,929 NT
Deadweight15,984.6 t
Transit Speed15 knots
Deck & Cargo
Free Deck Space2,600 m2
Main Deck Area2,600 m2
Max Deck Load50 t/m2
Deck Strength10 t/m2
Max Cargo Weight9,200 t
Heavy Lift DescriptionDeck strength: 10 t/m2 general; 50 t/m2 around work moonpool.
Cranes
Main Crane - MacGregor
TypeKnuckle Jib Crane
LocationPS
main hoist400t @ 10-20m
main hoist163t @ 40m
whip hoist25t @ 10-42m
MacGregor Knuckle Jib Crane HMC 5150 LKO 1650-40 (4000-20) AHC 3000 m WUD Active Heave Compensation & Constant Tension
Auxiliary Crane 2 - MacGregor
TypeKnuckle Jib Crane
LocationSB
main hoist100t @ 7-11m
main hoist50t @ 18m
main hoist50t @ 7-18m
main hoist23t @ 35m
whip hoist10t @ 7-36m
MacGregor Knuckle Jib Crane HMC 3293 LKO 230-35 (1000-11) AHC 3000 m Active Heave Compensation & Constant Tension
Auxiliary Crane 3 - MacGregor
TypeDeck/Provision crane
Lift Capacity10t @ 15m
MacGregor Deck/Provision crane 10T@15m
Facilities
Total Berths150
Total Cabins114
Single Cabins50
Double Cabins50
Recreation Facilities3 dayrooms, 1 game room, 2 ship lobbies, 1 coffee shop, 1 gymnasium.
Office Facilities1 ship's office, 5 client offices (ROV control, on-line, etc.), 4 client workshops & stores, 2 conference rooms, 1 helideck reception.
Helideck
D-Value20.88 m
Propulsion & Power
Propulsion Typediesel_electric
Propulsion System
Diesel-electric plant with 6 x Wärtsilä 6L32 (3,300 kW) and 2 x Wärtsilä 8L20 (1,480 kW) diesel engines driving generators (6 x 3,170 kW and 2 x 1,405 kW, total approx. 21,800 kW), powering 2 x 6,000 kW controllable pitch propellers aft.
Engine Type6 x Wärtsilä 6L32 and 2 x Wärtsilä 8L20 diesel engines driving generators
Number of Engines8
Total Power21,820 kW
Generator Power21.83 MW
Environmental NotationCLEAN DESIGN
DP ClassDP3
Max Speed17.5 knots
Fuel Capacity2,614 m3
Battery Capacity1,740 kWh
Hybrid System
Vessel upgraded with a Wärtsilä hybrid propulsion solution including two 870 kWh battery packs and two 2.7 MW drives integrated with existing Wärtsilä engines and Low Loss Concept electrical systems to enable single-generator DP operation, reduce fuel consumption, emissions and engine running hours.
Thrusters
2x tunnel (2.2 MW each)
3x tunnel (2.2 MW each)
2x azimuth (2 MW each)
Build Information
Delivery Date17 Feb 2015
Last Conversion2023
ShipyardKleven Verft
Construction CountryNorway
NorwayConstruction LocationKleven Verft AS, Ulsteinvik, Norway
Class NotationDNV-GL +1A1 ICE-1B SPS COMF-V(2)C(3) HELDK-SH CRANE DEICE E0 DYNPOS-AUTRO NAUT-OSV(A) CLEAN DESIGN DK(+) BIS TMON
Owner & Operator
Owner
Operator
Mooring System
Wire Length632.5 m
Cable Lay Vessel Specifications
Cable Storage
Max Cable Load12,500 t
carousel - below deck(Below Deck)
Capacity4,500 t
Outer Diameter25.4 m
Cable turntable capable of handling 4,500 tonnes of cables below deck.
carousel - on deck(Above Deck)
Capacity8,000 t
Planned second cable turntable on deck; later source states 8,000-tonne capacity, earlier source mentioned 7,000 tonnes.
Cable Handling
Shallow Water Operations
Depth RegimeOffshore
Bottom StrengthenedNo
Spud CansNo
Number of Spud Cans0
Jointing Facilities
Cable Handling Hangar190 m²
ROV Support
Has ROVYes
Number of ROVs2
Work Classwork class; observation class
ModelSupporter WROV; Constructor WROV
ManufacturerKystdesign
Power150 hp
ROV HangarYes