Marine Link
Wednesday, October 26, 2016

New AVT 30/35 Class Tug from Robert Allan

March 12, 2009

In February, 2010, a new Voith tractor tug Ansar 20 was delivered from NGV Tech Sdn. Bhd. of Malaysia to Bakri Navigation for service in Saudi Arabia.

This new design, designated by Robert Allan Ltd., as an AVT 30/35 Class tug, is suitable for a wide range of duties including line tug operations, harbor towage, hose handling, and ship-handling.  Its main duties for Bakri Navigation will be assisting tankers in mooring and connecting cargo hoses at single point mooring terminals.

•    Length o.a.    97.4 ft
•    Beam, moulded        37.7 ft
•    Depth, moulded    14.4 ft
•    Maximum Draft (150 DWT)    15.7 ft
•    Power    2,700 kW

On trials the vessel performed fully to expectations, achieving a mean Bollard Pull in excess of 35 tonnes, and a free-running speed of 13 knots.

•    Fuel Oil    120 cu. Metres
•    Potable Water    58 cu. metres
•    Engine Lube Oil    3 cu. metres

Features of the AVT 30/35 design include a large aft working deck for towing, hose handling, and ship-handling operations; and a full-height raised forecastle running nearly half the length of the tug to provide a high standard of accommodation and a good sea-keeping capability for operation in exposed conditions.

The Ansar 20 has been outfitted to high standards for a crew of up to fifteen persons.  The main deck accommodates two quad cabins, two double cabins, a large change-room/wet gear space, and a spacious crew mess/lounge, served by a fully equipped galley.  The fo’c’sle level deckhouse includes three Officer cabins, and the lower deck level is devoted to stores and laundry facilities.  The wheelhouse is designed for maximum visibility with two control stations providing maximum visibility for both fore and aft deck working areas.

Main Propulsion for the Ansar 20 comprises a pair of CAT 3512B HD diesel engines, each rated 1,350 kW at 1,600 rpm.  Each engine drives a Voith model 26GII/165 AE 45 cycloidal drive unit in tractor configuration. 

The electrical plant comprises two identical diesel gen-sets, each with a 440volt/60 Hz. power output of 215 ekW. 

The main hawser winch aft is a single drum type, containing 300 metres of high-performance UHMWPE towline.  The winch is supplied by an electro-hydraulic power pack with 50% redundancy. 

Ship-handling fenders at the stern comprise a 600 x 300 cylindrical fender above a row of 300 mm "W" block fenders.  Similar "W" fenders are also located forward.  The main sheer is protected by aircraft tires.


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