A pair of RAmparts 3300AV Class ASD tugboats for Keppel-Smit

November 19, 2014


The ASD tugs KST Passion and KST Pride were just recently delivered to their owner, Keppel-Smit Towage Pte. Ltd of Singapore in October 2014. These two vessels are the first in the new RAmparts 3300AV series of tug designs by Robert Allan Ltd., and were constructed at the AVIC Zhenjiang Shipyard Marine Pte Ltd., Singapore at its facilities in China.


Particulars of the RAmparts 3300AV Class tugs are as follows:

Length overall, moulded:
Beam, moulded:
Depth, moulded (hull):
Draft, Summer Load:
33.00 m
12.20 m
5.40 m
5.23 m (above bottom of skeg)


The tugs were designed and constructed to American Bureau of Shipping classification requirements with the following notation:

✠ A1 Towing Vessel, Escort Vessel, Ⓔ, ✠ AMS, Unrestricted Navigation, Fire-Fighting Vessel Class 1 Tank capacities are as follows:

Fuel Oil:
Potable Water:
Main Engine Lube Oil:
Sludge Tank:
Grey Water:
Sewage Holding Tank:
– 202.3 m³
– 42.6 m³
– 2.5 m³
– 3.8 m³
– 4.7 m³
– 4.7 m³
– 10.0 m³
– 10.0 m³


On trials, both vessels met or exceeded all performance expectations, with KST Pride producing an average ahead bollard pull of 71.5 tonnes and achieving a maximum speed of 14.03 knots.



These vessels have been outfitted to high standards for a normal operating crew of ten. The Master’s cabin, Chief Engineer’s cabin and a double crew cabin are located on the main deck, and three double crew cabins are located on the lower accommodation deck. Also included at that lower level are the galley stores, laundry and common W/C. The deck machinery includes an electric hydraulic powered escort-rated ship assist hawser winch on the bow, and a towing winch on the aft deck. Open aft bulwarks and a heavy duty aft staple with tow hook are installed on the aft deck to facilitate towing operations. A capstan is also fitted on the aft deck to assist with line handling operations.

The wheelhouse is designed for maximum all-round visibility with a forward control station providing maximum visibility to forward and aft deck working areas.

Main propulsion for each tug comprises a pair of CAT 3516C diesel engines, each rated 2,000 kW at 1600 rpm, and each driving a Rolls-Royce, US255 fixed pitch Z-drive unit in ASD configuration.

The electrical plant comprises two (2) identical diesel gen-sets, each with a power output of 120 ekW.

Ship-handling fenders at the bow consist of one row of 800 x 400 cylindrical fender at the main deck level, with 300 mm W fenders between the main deck and the knuckle. A 300 x 300 hollow “D” fender provides protection at the main and foc’sle deck sheer lines, and 300 mm “W” block type fendering is fitted at the stern.

For more information on the KST Passion or KST Pride or any of the RAmparts 3300AV Class tugs, or on any other vessel designs developed by Robert Allan Ltd., please contact us at design@ral.ca.