The Jascon 18 is Sea Trucks Group's deepwater flagship construction vessel. It is built for performing marine construction and pipelay tasks in both ultra deepwater and continental shelf environments. Key specifications include its 150 meter length, 1800 ton crane, 399 person accommodation, and ability to lay pipelines from 4 to 48 inches in diameter underwater to 3,000 meters.

1. Vessel leaflet
Delivering the difference
JASCON 18
DP3 Deepwater Pipelay
Construction vessel

2. All information, data and other technical description in this document are for guidance purposes only and subject to change. © January 2015 – Sea Trucks Group – All rights reserved.
DP3 Deepwater Pipelay
Construction vessel
Jascon 18 with its twin-working decks is the deepwater flagship of the Group’s DP3 offshore
construction vessel fleet. This vessel is built according to the group’s hybrid design philosophy
and capable of performing a wide variety of marine construction and pipelay tasks in both ultra
deepwater and continental shelf environments.
Jascon 18
Specifications
GENERAL
Classification
ABS X A1 Vessel ⓔ, AMS, DPS-3, CRC, HELIDK,
UWILD, Unrestricted Service, GP
SPS code 2008
Flag Gibraltar
Call sign TBA
IMO number 8770261
UNDER CONSTRUCTION
Principal dimensions
Length overall 150.00 m
Breadth 36.80 m
Extreme breadth (bridge wings) 38.00 m
Depth 15.10 m
Draft (max) 6.80 m
Draft (max) including retr. thrusters 10.60 m
Gross tonnage (prelim) 25336 t
Net tonnage 7600 t
Deadweight (summer) 11890 t
Displacement (summer) 30146 t
Cranage
Main crane (Huisman Itrec)
1800 mTon @ 27 m
Main hoist revolving 1200 mTon @ 33 m
Auxiliary hoist
600 mTon @ 29 m, 300 mTon @ 59 m
Whip hoist 100 mTon @ 82 m
Heave compensated auxiliary hoist
Underwater capacity
300 mTon @ 3000 m
Auxiliary deck crane
2 x Pedestal type, 40 Ton @ 40 m, make TTS
DECK Space
Approx. 1800 m²
DECK Load
5 t / m²
Capacities
Fuel oil (storage) 3562 m³
Fuel day tank (total) 396 m³
Fuel overflow 325 m³
Lube oil 198 m³
Fresh water (potable) 2540 m³
Ballast water 10943 m³
Sludge oil 79 m³
Dirty oil 20 m³
Black / Grey water 568 m³
Bilge water 99 m³

3. Specifications
All information, data and other technical description in this document are for guidance purposes only and subject to change. © January 2015 – Sea Trucks Group – All rights reserved.
Compressed air
3 x TMC Service Air Compressors rated at
11 bar, 1680 m³ / hrs FAD
2 x Hatlapa Starting Air Compressors rated at
30 bar, 85.5 m³/ hrs FAD
DP System
Kongsberg K-POS 22 working/ navigation bridge
Kongsberg K-POS 12 control station at DP
Back-up room
DP Reference Systems
- 1 x Radius 1000
- 2 x DGPS receivers
- 3 x Gyro compass
- 4 x Motion reference units
- 1 x Lightweight Tautwire
- 1 x HIPAP 500
- 3 x Wind sensors
Power plant
8 x EMD 20-710G7B diesel engine
(3580 kW) each
EM DG- 1 x Caterpillar 3508B diesel engine
910 kW
Propulsion
Propulsion thruster ROLLS ROYCE
2 x FPP azimuth motor driven
(US305) - 3000 kW each
Aft/Forward retractable thrusters
ROLLS ROYCE
5 x FPP azimuth motor driven
(UL255FP) - 2400 kW each
2 x FPP azimuth motor driven
(UL2001) - 1800 kW each
Bow thruster ROLLS ROYCE
1 x motor driven (TT2400DPN) - 1700 kW each
Endurance key parameters
Freshwater making capacity
2 x 100 t / 24 hrs
Fuel consumption (typical)
- In port 7 m³ / 24 hrs
- Transit 38 m³ / 24 hrs
- DP 23 m³ / 24 hrs
(Accommodation mode)
Helideck
Aztech Aluminium Helideck with Deck integrated
fire fighting system (DIFFS) suitable for Sikorsky
S-92A Helibus
Maximum “D” Value helideck 22.20 m
Maximum take-off weight 12.80 t
HMS Kongsberg 100
DIFF system & Chemguard Foam Station,
36 Gallons
Accommodation
399 people in 123 cabins
- 84 x 4 persons cabins
- 24 x 2 persons cabins
- 7 x 1 person cabins
- 8 x 1 STATE cabins
Fully air-conditioned permanent accommodation
for up to 399 persons in cabins all with ensuite
bathroom facilities. Including conference room,
offices, cinema, gymnasium, recreation rooms,
laundry, internet café and a medic room with
hospital.
Radio / Communication / Entertainment
V-Sat
GMDSS
INMARSAT Fleet 77
EPIRB
SART
VHF
UHF
AIRBAND VHF
Integrated Multimedia
Communication System
- PA/GA
- Automatic telephone
- Talk back
- IPTV/TVSAT
- Sound powered telephone
- LAN
- CCTV
- Master Clock
- Video on Demand
Lifesaving appliances
Liferafts 8 x 25 persons
Lifeboats 4 x 130 persons +
2 x 150 persons
Fast rescue boat 2 x 6 + 1 persons
Gangway (Optional)
Max length 42.50 m
Length in mid position 36.50 m
Height of pedestal up to 15.00 m
Make Marine Aluminium, Norway
Pipelay equipment
Concept Single joint S-lay system on Tween
deck at CL, below main deck, make SAS Gouda
Capacity 4” - 48” diameter pipe
(with coating 60”)
Tensioners 3 x tensioner of 200 t each
A&R winch 2 x 300 t
Workstations Firing Line
4 x welding stations,
1 x NDE (X-ray or Ultrasonic) / repair station,
3 x welding stations on the Piggy Back platform,
2 x coating stations
Stinger length 120 m, in two sections
Davits 3 x with load cells, capacity 60 t each
Mooring system
Anchor windlasses
- 2 x Constant tension Barge mooring
winches, midship - 25 t at mid layer
- 2 x Electric Mooring Winches, Aft - 40 t
at mid layer
- 2 x Electric Winch Bollards, forward - 15 t
at mid layer
Capstans 2 x 10 t AFT
Additional Data
Sewage treatment unit
vacuum system, with nil overboard discharge,
make EVAC
Incinerator 800,000 kcal / hrs,
make Detagasa
Yokohama fenders 6.50 x 3.30 m
Moon pool 8.00 x 5.80 m at SB

4. seatrucksgroup.com
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STG JASCON 18
All information, data and other technical description in this document are for guidance purposes only
and subject to change. © January 2015 – Sea Trucks Group – All rights reserved.
Sea Trucks Group has offices in
West Africa, Middle East, Europe,
South East Asia, Australia and
North America.
Globally
represented
WEST AFRICA
1 Lagos, Nigeria
Headquarters / Engineering &
Operations office
2 Onne, Warri, Escravos, Nigeria
Operational bases /
fabrication yard
3 Accra, Ghana
Support office
4 Luanda, Angola
Support office
5 Pointe Noire, Congo
Support office
EUROPE
6 Rotterdam, The Netherlands
Engineering & Support office
NORTH AMERICA
7 Houston, U.S.A.
Representative office
MIDDLE EAST
8 Sharjah, U.A.E.
Corporate Support office /
fabrication yard
ASIA PACIFIC
9 Perth, Australia
Support office
10 Shanghai, China
Vessel construction
11 Singapore
Site office
Sea Trucks Group (HQ)
4a Onitana Road
P.O. Box 8755
Ikoyi – Lagos
Nigeria
T +234 1 791 8634
Sea Trucks Netherlands
Delftseplein 27N
P.O. Box 176
3000 AD Rotterdam
The Netherlands
T +31 10 75 40 100
seatrucksgroup.com
SURF Installation Accommodation Hook-up and Commissioning
Pipelay Heavy Lift Decommissioning MARINE SUPPORT