Project Description


Ramparts 2400 SX 60  70  75
LOA (m): 24.40 24.40 24.40
Beam moulded(m): 11.25 11.25 11.25
Draft extreme (m): 5.2 5.6 5.70
Fuel oil (m3): 72.40 72.40 72.40
Main Engine Power (kW): 2×1765 2×2100 2×2350
Speed ahead (knots): 12.5 13 13
Bollard Pull ahead (tons): 60 70 75

Ramparts 2400 SX 60 / 70 / 75

The RAmparts 2400 SX tug is twin Z-drive, diesel powered tug designed for maximum efficiency in the performance of ship-handling duties for sea going ships. The hull form and layout have evolved over several years through the extensive experience of the designers at Robert Allan Ltd. working with tug owning Clients and their crews in developing truly high-performance tugs for this challenging service.

Robert Allan Ltd. have extensive experience in the custom design of high performance ASD tugs to mach Clients’ specific operational requirements. Vessels to these designs have been widely acclaimed for their overall design and particularly their maneuvering, sea-keeping and stability performance.

2400 SX model, an exclusive Sanmar design, is closest to the ASD 24/45 & ASD 24/50 design but with a 2m increase in beam over the same length. This ensures greater performance as well as stability from more powerful Caterpillar engines coupled to larger Rolls-Royce Z-drives. The new versions will give 60, 70 or 75 tons bollard pull depending on the propulsion system size selected by the customer.

This design is based on an intended low-manning operation with a high standard of machinery automation but the accommodations can be adjusted to match almost any reasonable requirement. The layout shown has been developed to match the most commonly acceptable manning standards. Optional layouts are available as either basic “day boat” or with full accommodation for a crew of up to six persons.

The RAmparts 2400 SX design code “SX” for Sanmar Exclusive which means the design has been modified by Robert Allan Ltd. to suit Sanmar Shipyards’ standard production range and optimized with the operational input from Sanmar’s tug operation department.

Technical Details

Dimensions60 Tons70 Tons75 Tons
Length overall            24.40 m24.40 m24.40 m
Breadth moulded      11.25 m11.25 m11.25 m
Depth moulded          4.38 m4.38 m4.38 m
Draft extreme            5.2 m5.6 m5.7 m
Draft hull                  3.15 m3.175 m3.185 m

Fuel Oil72.40 m3
Fresh Water10.80 m3
Foam6.60 m3
Black Water3.80 m3
Grey Water3.80 m3
Oily Water4.40 m3
Ballast Water42.60 m3

60 Tons Version

Main EnginesCaterpillar 3512 C HD
Engine Power2 x 1765 kW @ 1800 rpm
ThrustersRolls Royce US205 FP
Propeller Diameter2400 mm
NozzlesMild Steel
ShaftingCarbon fiber shafts
Resilient MountVulkan T60
Silencer-35 dba sound attenuation, spark arresting type

70 Tons Version

Main EnginesCaterpillar 3516C HD
Engine Power2 x 2100 kW @ 1600 rpm
ThrustersRolls Royce US255 FP (Optional CPP)
Propeller Diameter2600 mm
NozzlesMild Steel
ShaftingCarbon fiber shafts
Resilient MountVulkan T60
Silencer-35 dba sound attenuation, spark arresting type

75 Tons Version

Main EnginesCaterpillar 3516C HD
Engine Power2 x 2350kW @ 1600 rpm
ThrustersRolls Royce US255 FP (Optional CPP)
Propeller Diameter2600 mm
NozzlesMild Steel
ShaftingCarbon fiber shafts
Resilient MountVulkan T60
Silencer-35 dba sound attenuation, spark arresting type

Performances60 Tons70 Tons75 Tons
Bollard Pull (Ahead)60+ tons70+ tons75+ tons
Bollard Pull (Astern)55+ tons65+ tons70+ tons
Speed (Ahead)12.5 knots13.0 knots13.0 knots
Speed (Astern)12.0 knots12.5 knots12.5 knots
Make / Model2 x Caterpillar C4.4
Power86 ekW, 400V 50Hz

Fore Winch Type

Frequency controlled electrical drive towing winch with tension and length indication, constant tension. Capacity 2X135m of dia 40mm synthetics rope on five 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 70-130P or DTH 90-135P
Pneumatic quick release
Located on tow post

Marine type hydraulic or electrical driven
Maximum pull 5 tons

Deck Crane
Class certified crane, wire, pulley, hook with overload protection
• Marine grade hydraulic, knuckle-boom/folding boom type crane, Palfinger 11001
Capacity – maximum lift of 2 tons at 4 m
– maximum reach 10 m with lift up to 0.8 tons

Tow Pins
Marine type hydraulic driven tow pin,
Capacity 60/70/75 tons SWL

All accommodation space is heated, vented and air-conditioned
Secondary AC unit in wheelhouse
Cold climate package
Hot climate package
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; 1200 m3/hour

1 x Monitors : – FFS foam/water monitors
– Remote operated, electric controls


Fire-fighting capability to Fi-Fi 1 standard
Dedicated diesel driven fire pump
1 x Main fire pump – driven by CAT C32
dedicated diesel
– Capacity; 2800 m3/hour
2 x Monitors – FFS foam/water monitors
– Remote operated, electric controls
Unattended machinery space according to ABS ABCU notation. Alarm Display at mess room and chief engineer cabin. Extended operation of electrical system, essential pumps and engine room fans can be controlled from wheelhouse.
Above deck; Captain and chief engineer cabins, mess/lounge and galley and W.C. with shower. Below deck; Two double cabins, W.C. with shower, laundry. North European Standards in Comfort and Quality. Teak imitating IMO approved floor material.
Radar, GPS, DGPS, Echo Sounder, AIS, Magnetic Compass, Autopilot, Speed log, BNWAS, General Alarm, Intercom, SP telephone, Engine Telegraph, GMDSS A2, VHF, MF/HF
Hands free operation of VHF’s
Remote operation of VHF from messroom,
Captain’s Cabin
Secondary Radar with overlay
Aft monitor for radar
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.
Heavy duty rubber fender system as follows:

Bow – 800 OD x 400 ID cylindrical
Stem – W type
Sides – D type
Stern – W type

D/O separator
Remote operated searchlights
Heated windows and Wipers
Big Shipping hatch for engines removal
E/R fans with silencers
Bilge Separator
Fresh water ultraviolet sanitizer
Heated floors for wet spaces
Two speed E/R fans with silencers
Solas Boat & Crane
Vacuum Toilet
Double Navigation Lights
Lifting Lugs
ABS, +A1, +AMS, Towing Vessel, UWILD, QR

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