Earlier this month Sanmar Shipyards delivered a pair of Robert Allan Ltd. designed terminal support/escort tugs to Orkney Islands Council Marine Services, in Scotland.
The unique and historical names Odin of Scapa and Thor of Scapa were chosen by a widely supported, local voting exercise launched by the Council in November of 2019. The two 32-meter newbuilds are replacing two of the three tugs currently operated by the owners.
The RAstar 3200-SX tugs are purposely designed with a shallower draft than other comparable high-performance escort tugs and incorporate considerable input and collaboration with Sanmar. This includes design optimization to minimize construction costs without reducing end performance, implementing feedback from the large number of companies already operating Sanmar built Robert Allan Ltd. designed tugs and pre-engineering features, such as deck machinery, accommodation layout, etc., to easily allow future customization requests received from their global customer base to be quickly implemented.
The RAstar 3200-SX escort/ship-assist tug is a twin Z-drive, diesel-powered vessel, designed for the performance of ship-handling, towing and escort duties.
Propulsion consists of of two Caterpillar 3516C main diesels, each delivering 2350 bkW at 1,800 RPM, driving a pair of Rolls Royce model US255 Controllable pitch Z-drives with 2.8 m diameter propellers. The vessels are each equipped with three CAT C 4.4 diesel gensets.
The escort tugs are equipped for operations over the bow and stern, with a powerful DMT escort winch at the bow for escorting and ship handling operations, and a DMT towing winch, MacGregor Triplex guide towing pins and rounded transom at the stern for towing.
Ship-handling fenders at the bow consist of an upper row of cylindrical fender and a lower course of W-fender. Sheer fendering consists of “D” rubbers. “W” block type fendering at the stern.
Odin of Scapa and Thor of Scapa (Photo: Robert Allan Ltd.)
Length, overall: 32 m
Beam, moulded:13 m
Depth, least molded: 5.35 m
Maximum draft (overall): 5.5 m
Gross tonnage / net tonnage: 497/149
Tank Capacities at 98%:
Fuel oil: 162 m3
Potable Water: 20 m3
Main engine lube oil: 1 m3
Foam: 9.8 m3
Sewage holding tank: 9 m3
The accommodations have been outfitted to a high standard for a crew of six. The deckhouse contains an entrance lobby, the galley, mess, two officer cabins with ensuite WC, and a laundry. The lower deck contains one plus one double berth cabins with shared WC and two single officer cabins with ensuite WC. The wheelhouse is designed with a single split control station which provides maximum all round visibility and exceptional visibility to the bow and side fendering. The engine room features an acoustically isolated switchboard room.
The vessel is constructed to RINA class requirements with the following notation: RINA C * Hull * Mach, Escort Tug, Fire Fighting Ship 1 – Water -spraying, Unrestricted Navigation, AUT-UMS, Inwatersurvey.
On trials, the Odin of Scapa and Thor of Scapa met or exceeded all performance expectations, with 78 t bollard pull ahead and 14.3 knots free running speed.