Project Description


RAmparts 45 Tons 50 Tons
LOA (m): 24.40   24.40
Beam moulded(m):  9.15 9.15
Draft extreme (m): 4.80 5.2
Fuel oil (m3): 73 73
Main Engine Power (kW): 2×1230 2×1500
Speed ahead (knots): 12.5 12.5
Bollard Pull ahead (tons): 45 50
Sanmar Shipyards - Ramparts - Ulupınar

The RAmparts Class tugs are twin Z-drive, diesel-powered 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, Robert Allan Ltd., working with their tug-owning Clients and their crews in developing tugs for this challenging service.

The RAmparts Class tugs are of robust, all-welded steel construction, with scantlings in excess of the minimums of any Classification Society.

Although the basic designs are intended as dedicated assist tugs, working off a forward winch, design options can be readily included to outfit the tugs for any of the following services:

  • Fire-fighting
  • Aft towing

Technical Details

45 ton version
Length overall                =24.40 m
Breadth moulded           =9.15 m
Depth moulded              =4.00 m
Draft extreme                = 4.80 m
Draft hull                       =3.0 m

50 ton version
Length overall                 =24.40 m
Breadth moulded            =9.15 m
Depth moulded               =4.00 m
Draft extreme                 = 5.2 m
Draft hull                        =3.0 m

Fuel oil                                    =  73.00 m3
Fresh water Ballast                   =  11.40 m3
Foam                                       =  2.00 m3
Sewage holding tank                =  2.00 m3
Sludge holding tank                 =   2.70 m3

45 Ton version
Main Engines            Caterpillar 3512 C
Engine Power            2 x 1,230 kW @ 1800 rpm
Thrusters                 Rolls Royce US155 FP
Propeller Dia             2000 mm
Nozzles                    Mild Steel
Shafting                    Solid shafts
Resilient Mount         Vulkan T60

50 Ton version
Main Engines           Caterpillar 3512 C
Engine Power           2 x 1500 kW @ 1600 rpm
Thrusters                 Rolls Royce US205 FP
Propeller Dia            2200 mm
Nozzles                   Mild Steel
Shafting                   Solid shafts
Resilient Mount        Vulkan T60

45 Ton version
Bollard Pull (Ahead) Approx 45 tons
Bollard Pull (Astern) Approx 42 tons
Speed (Ahead) 12.5 knots
Speed (Astern) 10.0 knots

50 Ton version
Bollard Pull (Ahead) Approx 50 tons
Bollard Pull (Astern) Approx 45 tons
Speed (Ahead) 12.5 knots
Speed (Astern) 10.0 knots

Make/model –    2 x Caterpillar C4.4

Power            –    86 ekW

Fore Winch

Type : DMT TW-E250kN

Frequency controlled electrical drive towing winch with tension and length indication, constant tension. Wire capacity 347m of dia 40mm synthetics rope on ten layers on both drums. Band brake holding load 150 tons.

Haul-in, 1st speed: 25 ton @ 0 – 9   m/min
Haul-in, 2st speed: 8 ton   @ 0 – 28 m/min

Tow Hook

– Data Hydraulic DTH 45-90P or DTH 70-130P
– Pneumatic auto-release
– Located on capstan


– Marine type hydraulic or electrical driven
– Maximum pull 5 tons

Aft Winch

Frequency controlled electrical drive towing winch with approx 25 ton pull at 9 meter / minute. Break holding force 150 tons. Can carry 650 meter 40 mm towing wire. High capacity spool device. Tension and Lenght indication. DMT or equal

Deck Crane

Class certified crane, wire, pulley, hook with overload protection
Marine grade hydraulic, knuckle-boom/folding boom type crane, Palfinger 11001

– maximum lift of 2 tons at 4 m
– maximum reach 10 m with lift up to 0.8 tons

Marine type hydraulic driven tow pin,
– 45/50 tons SWL

Unattended machinery space according to ABS ABCU notation. LED panels at mess room and chief engineer cabin. Extended operation of electrical system, essential pumps and engine room fans can be controlled from wheelhouse.
Radar , GPS , DGPS , Echo Sounder, AIS , Chart Plotter , Magnetic Compass, Autopilot, Speed log , BNWAS , General Alarm, Intercom, SP telephone , Engine Telegraph, GMDSS A2
Hands free operation of VHF’s
Hands free operation of intercom
Remote operation of VHF from messroom , captain’s cabin
Secondary Radar with overlay
Aft monitor for radar
Above deck captain and engineer cabins with washbasins. Mess, lounge and galley. Under deck, two double cabins, wc&shower. All cabins with desk, chair, arials for gsm and tv. Floors covered with IMO approved teak imitating covering. Very high level of quality, comfort and safety suiting the requirements of flag authorities such as Germany, Italy and UK.
All accommodation space is heated vented and air-conditioned
Secondary AC unit in wheelhouse
Increased air conditioning package for cold climates with optional double redundancy AHU and compressors.
Increased heating package for cold climates with hot water radiator heaters at accommodation and gasoil burning boiler, main engine and/or generator diesel pre heaters, heated windows at wheelhouse, heated window wipers, wheelhouse windows demist fans.
Fire-fighting capability;
– M/E driven fi-fi pump
– 1 x Main fire pumps :
– driven through clutched flexible coupling on front of each main engine
– Capacity; 600 m3/hour
– 1 x Monitors :
– FFS water monitors
– Manual operated
Fi-Fi 1

1 x Main fire pumps :

–   driven by dedicated diesel
–   Capacity; 2,800 m3/hour

2 x Monitors :

–   FFS foam/water monitors
–   Remote operated, electric controls

Heavy duty rubber fender system as follows:
– Bow – 500 OD x 250 ID cylindrical
– Stem – W type
– Sides – D type
– Stern – D type
Special care has been given to resilient mount all engines and essential equipment including hydraulic pipes. Sound levels are according to requirements of Flag Authorities
D/O separator
Double Navigation Lights
Remote operated searchlights
Two speed E/R fans with silencers
Bilge Separator
Heated windows and Wipers
Fresh water ultraviolet sanitizer
Heated floors for wet spaces
Solas Boat & Crane
Vacuum toilet
RINA, +C Hull and Machinery, Tug, Unlimited Navigation

View or download the detailed technical specification for ULUPINAR ASD 24/45 & ASD 24/50 series below.

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