New RAstar ASD Tugs Delivered to Tianjin Port

The final two tugs of a five-tug fleet improve program have simply been delivered to Tianjin Port of China from CCCC Bomesc Marine Industry Co. Ltd. in Tianjin metropolis.

The 5 tugs had been designed by Vancouver-based naval structure agency Robert Allan Ltd (RAL), nevertheless they cowl two distinct designs, says RAL. The Jin Gang Lun 28 and Jin Gang Lun 29 had been RAstar 3500 class tugs, nevertheless their predecessors, the Jin Gang Lun 26 and Jin Gang Lun 27 had been each RAmparts 3500 collection tugs that includes a special hull kind.

RAL says that on account of an inside analysis and improvement program using computational fluid dynamics simulations the roll angle and roll acceleration of the RAstar tugs had been calculated to be about 22% and 12% decrease, respectively, as in comparison with the RAmparts collection.

The CFD simulations had been carried out at a design velocity of 14 knots in beam seas of irregular waves.

Vessel Particulars:

Notation: China Classification Society – FiFi 1, CSAD, Tug, Coastal Service, Ice Class B, CSMD, BRC
Length O.A.: 35.00 m
Beam, moulded, excessive: 12.40 m
Depth, moulded (hull): 5.40 m
Maximum Draft: 4.22 m
Propulsion: (2) Niigata 8L28HX; 2206 kW at 750 rpm
Thrusters: (2) Kawasaki, KST-220ZC/B-2.7 controllable pitch
Electrical: (3) 100 ekW diesel gensets
Fuel Oil: 183 m³
Fresh Water: 30 m³
Foam: 20 m³
Crew: 14
Bollard Pull: 74.5 tons
Free operating velocity: 14 knots

The deck equipment includes two ship-assist hawser winches ahead, and a tow hook on the aft deck. In addition, a capstan is put in aft to facilitate line dealing with operations.

Ship-handling fenders ahead consist of 1 row of 700 x 350 cylindrical fender on the important deck lever, with 600 x 400 mm M block fenders between the principle deck and the knuckle. Steel half pipe fenders with components of 400 x 400 “D” fender present safety on the important and foc’sle deck sheer strains, and a 500 x 250 cylindrical fender is used on the stern.