A new Z-drive tug has started operations on the US west coast to enhance ship escort and ocean towing in the region.
Shaver Transportation has taken delivery of Samantha S from Portland, Oregon-based builder Diversified Marine Inc. This multipurpose tug was built to a Jensen Maritime design and ABS class for oceangoing operations and emergency situations.
Samantha S is a 34.5-m tug with 6.7 m draught and more than 100 tonnes of bollard pull. It was built for ocean towing, escort duties, ship assistance, emergency towage and fire-fighting capabilities.
It has a raised pilot house and a squared forward end. Jensen Maritime, a subsidiary of Crowley Maritime, also included a large, flat bow in the design that allows Samantha S to move up flat against the transom of oceangoing ships in the Columbia River. It can also conduct offshore and rescue tows and tackle fires.
Samantha S is powered by two GE 12V250 engines that comply with the US Environmental Protection Agency’s Tier 4 emissions requirements. These are medium-speed diesel engines, each rated at 3,145 kW.
These drive a pair of Rolls Royce 305, four-bladed Z-drives. Also in the engineroom are two John Deere 6090A generators that comply with EPA Tier 3 levels and one Caterpillar C32 fire pump power plant. The rest of the fire-fighting system includes a fire pump and two fire monitors provided by Fire Fighting Systems’ agent, In-Mar Systems.
Samantha S has accommodation for 10 people. Its deck machinery includes eight Wintech 120-tonne deck winches, a Rapp HA-149H-250 escort winch, and a Rapp double drum AHTW-75H-165 tow winch.
Jensen has become a main designer of tugs operating on the US west coast. It has supplied designs to Foss Maritime for constructing up to 10 escort tugs by Nichols Brother Boat Builders. These tugs will be based on an adapted Valor tugboat design and also comply with EPA Tier 4 requirements.