Striking Bollard Pull Results For The ALP Striker

By Vessels

ALP Striker achieved an impressive bollard pull result of 309.6t at her sea trials. The DPII Anchor Handling Salvage Tug was delivered on 12 September to ALP Maritime Services. The vessel is designed for towing very large floating objects while also offering services such as anchor handling, positioning and mooring.

The ALP Striker has been constructed by Niigata Shipbuilding & Repair, Japan. She is the first of four ultra-long distance towing and anchor handling vessels for ALP Maritime Services, a subsidiary of Teekay Offshore Partners L.P. The vessel is a part of the shipowner’s ALP FUTURE class, a series of stronger and larger towing vessels to match and enable increase in size of FPSO’s, FLNG’s and similar floating installations.

Striking Bollard Pull Results For The ALP Striker

The ULSTEIN SX157 ship design, the Alp Striker, about to start her journey - Image courtesy: Ulstein

The ALP Striker is based on the ULSTEIN SX 157 design. The vessels were developed especially for this project in close collaboration between ship designer Ulstein Design & Solutions AS and ship owner ALP Maritime Services.

These vessels are able to perform worldwide ocean towage of any distance, as well as positioning and hook-up of floating installations to pre-laid mooring systems, anchoring of installations and floating objects and disconnecting and mooring retrieval as part of repositioning or decommissioning operations. The vessels are able to do this with minimal fuel bunkering stops, optimal fuel-efficiency with a four-independent engine configuration, and high Bollard Pull. ULSTEIN X-BOW© design guarantees optimal course stability and sea keeping in adverse weather and sea conditions.

The ALP Striker performed an impressive and most satisfactorily Bollard Pull Test

The ALP Striker performed an impressive and most satisfactorily Bollard Pull Test - Image courtesy: Ulstein

Service speed is 13 knots, while their top speed is 19 knots. With a fuel capacity of more than 3,500 m3, they can tow at full power for 45 days, sufficient for non-stop Trans-Atlantic/Indian, Pacific Ocean towing operations without fuel calls. The vessels are 88.9 metres long and 21 metres wide.

ALP Striker is the first vessel in the ALP Future Series

ALP Striker is the first vessel in the ALP Future Series - Image courtesy: Ulstein

When developing the design Ulstein had to ensure that each vessel has the sufficient bollard pull and operational reliability to handle even the heaviest tows by only two vessels. Environment and fuel efficiency have also been important criteria. The vessels are classed with DNV’s Clean Design and Ice Class 1B notations, which allow operation also in restricted zones. Additionally, they are equipped as anchor handling vessels including stern roller, a three-drummed winch with 400t hoisting capacity, and with chain lockers for rig chain. The ships have a comfortable and spacious accommodation for 35 persons reflecting long periods at sea.

The ALP Striker has been delivered to ALP Maritime Services

The ALP Striker has been delivered to ALP Maritime Services - Image courtesy: Ulstein

Ulstein is also responsible for the deliveries of main components, such as engines, thrusters and propellers, winch, power distribution and thruster drives, control system and communication system.

ALP Striker performed an impressive and most satisfactorily Bollard Pull Test

ALP Striker performed an impressive and most satisfactorily Bollard Pull Test - Image courtesy: Ulstein

ALP Striker is the first vessel in the ALP Future Series

ALP Striker is the first vessel in the ALP Future Series - Image courtesy: Ulstein

Main characteristics:
Long Distance Towing
High bollard pull: For the towing of very large floating objects
Also equipped for: Anchor Handling, positioning, mooring
Dynamic Positioning Class II (DYNPOS-AUTR)
Worldwide work
Optimal seagoing characteristics (ULSTEIN X-BOW®)
Fuel efficient
Clean Design
Comfort Class Comf-V (3)
Ice Class 1B
Fire Fighting (FiFi II)
The 4 MAK engines produce 24,400 BHP.
Cargo deck area: 550 m2
Deck cargo 2,400t - 10t/m2 Max
Deadweight 4,250t

Source: Ulstein