Media Luna Tugboat, Colombia
Media Luna is the first of the two Azimuthal Stern Drive (ASD) tugboats in the Advanced Voith Tractor (AVT) 3000 Class designed by Robert Allan, Naval Architects of Vancouver.
The vessel was delivered to its owner Cerrejón in January 2013, followed by the delivery of its sister vessel Cabo de la Vela in March 2013.
Cerrejón ordered for Media Luna to replace the Riohacha as part of the company's fleet renewal programme. The new vessel was constructed by Uzmar at its Uzmar Tug and Work Boat Factory, located in Izmit, Turkey.
Media Luna and its sister vessel are the two most powerful tugboats in the fleet, designed for a bollard pull of 63.1t. The vessel is capable of handling freighters of up to 180,000t. It was designed and constructed to BV Class requirements and carries BV 1, X HULL, X MACH, TUG, Unrestricted Service class notations.
Media Luna dimensions and design
The Media Luna has an overall length of 30.75m, beam of 12m, depth of 4.80m and maximum draft of 6.2m.
The wheelhouse of the vessel is fitted with frameless bonded windows to avert window mullion obstruction. The vessel features a single split control station enhancing visibility for both ahead and astern operation and over the aft working deck.
The vessel is capable of operating in rough weather conditions for which the vessel's foscle has been slightly raised. The tugboat features a pilot boarding platform at the bridge deck level. The workshop and stores area is located on the vessel's aft hold.
The design incorporated various measures, such as resiliently mounted main engines, gensets and auxiliary engine, high attenuation engine exhaust silencer systems, ventilation silencers, sound dampening deck treatments and insulation measures to reduce noise and vibration. A sound proofed switchboard room has also been incorporated into the engine room of the vessel.
Tank capacities of the Media Luna tugboat
The vessel is equipped with tanks which can store 182m³ of fuel oil, 35.0m³ of clean drinking water, 4.4m³ of main engine lube oil, 2.2m³ of VSP lube oil, 2.2m³ of hydraulic oil, 4.8m³ of sludge, 4m³ of grey water, 9.6m³ of sewage and 12.2m³ of foam.
Vessel accommodation, deck machinery and fire safety equipment
The vessel accommodates four crew members in two officer cabins and a double berth cabin. The officer cabins, a galley and a mess room are incorporated into the main deckhouse. The officer cabins feature a common en suite. A double berth cabin, a laundry and a common WC space including galley stores are featured on the lower deck.
The vessel features a Rolls Royce ATWH 1500/200 render-recover towing winch with a horizontal warping head on the aft deck. The winch has a pull of 20t per minute at an outreach of 18m and 5t per minute at an outreach of 50m.
The aft deck also features a Heila deck crane rated 5t at five metre reach.
A Rolls Royce AW20.5U2H anchor windlass comprising of two cable lifters and two horizontal warping heads is fitted in the foredeck of the vessel.
The tugboat is equipped with an independent FIFI Caterpillar C18 546kW pumpset capable of delivering sea water at 1,200m³ per hour.
The vessel comprises of an upper row of cylindrical fender measuring 800mm in diameter and a lower course of W-fender at the stern. Sheer handling fenders consists of 300mm D- rubber and a 300mm "W" block type fendering fitted at the bow. The stern fendering incorporates a fender spray lubrication system operated from the wheelhouse.
Propulsion details of Cerrejón's Media Luna
The vessel is propelled by a Voith Schneider 30R5-250 cycloidal propeller driven by two GE 12V228 diesel engines, each rated 2289kW at 1,050rpm. The vessel is further equipped with two auxiliary Caterpillar C 6.6 ACERT diesel gensets with an output of 125kW each. The vessel sails at a speed of 13.6kt.
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