Sanmar Celebrated 5 tugboats with a Ceremony
In a remarkable ceremony, a quartet triple of tugs built by Sanmar Shipyard for the Norwegian operator Bukser og Berging were formally named Borgøy, Bokn, and Baus.
Block erection of tugboat Biso and keel laying ceremony of another tugboat took place same day as well. Respectively, the vessels comprise a pair of innovative 35m long, 70 tonnes bollard pull LNG-fuelled tugs, a 28m powerful 75 tonnes bollard pull terminal tug and a compact 24.39m ship berthing tug 50 tonnes bollard pull, and 15m line handling tug.
Borgøy and Bokn are 35m LNG-fuelled sister tugs of a new design and are described elsewhere. The other two vessels are different models from Sanmar’s proven, popular and exclusive range of diesel powered vessels.
Baus is the seventeenth completion of the much admired Ulupinar Series of ship assist tugs. Again by the Canada-based naval architecture firm of Robert Allan Ltd., these are ASD tugs designed for maximum efficiency in the performance of ship-handling duties for tankers, bulk carriers, and container ships in particular. The hull form and layout have evolved over several years through the extensive experience of the designers, but with considerable additional input from Sanmar. They are of robust, all-welded steel construction, with scantlings in excess of the minimums of any Classification Society.
The static bollard pulll of 50 tonnes is derived form a Caterpillar/Rolls Royce combination with 3512C diesels, each developing 1,500kW, driving type US205CP azimuthing Z-drives with 2,200mm diameter controllable pitch propellers.
Although a smaller vessel, the Ulupinar series is renowned for its clever internal layout making the best possible use of the space available and provides extremely comfortable living quarters for a total complement of six persons in four cabins.
Bison is the ninth manifestation of the Sanmar Terminal Class of fire-fighting tug, packing a healthy 75 tonnes of bollard pull into a 28m long Robert Allan Limited designed escort/offshore terminal tug of ASD, designed with a 13.20m beam sponsoned hull form, which has been proven to provide significantly enhanced escort towing and sea-keeping performance. The escort forces are enhanced by the effects of the sponson as well as the foil-shaped escort skegs fitted. Roll motions and accelerations are less than half those of comparable sized “standard” tug hulls.
The direct pulling capability is derived from a propulsion plant comprising a pair of Caterpillar 3516C diesels turning stern-mounted Rolls Royce type US25C controllable pitch azimuthing Z-drives with four-bladed propellers of 2,800mm diameter. Rolls Royce also supplied the forward split drum ‘escort’ winch. The vessel has accommodation for 10 persons in six cabins, galley, mess and laundry.
The entire quartet of vessels participating in this multiple naming ceremony have ergonomically designed wheelhouses with clear unobstructed all round vision. All the vessels handling controls, navigational and communication electronics systems are state-of-the-art and easily accessible from the helm position.
The fifth vessel is the requirement from Bukser og Berging for a versatile and extremely manoeuvrable line-handling boat, another Robert Allan Ltd design, 1500 ASD RAscal, also with ASD propulsion. Designed for maximum efficiency in the performance of line-handling, ship-handling and related terminal support activities, the vessel is equipped with a hawser winch and staple forward, with heavy bow fendering for ship-assist work. A towing bitt and tow-hook are fitted aft for line-handling and general towing duties.