On Friday December 9, 2016 the new build Damen Shipyards Hardinxveld yard number 571705 Shoalbuster 2709 “Isa” was christened at the Dutch shipyard. Shoalbuster Isa (Imo 9787950) is the newest addition to the V.O.F. sleepboot ISA – Wijk bij Duurstede. ISA is a shoalbuster 2709 type Designed for multiple roles undertaking varied assignments in diverse working environments. Especially designed to work in shallow as well as deeper water, often in areas of limited manoeuvrability. Designed for heavy duties with an optimum bollard pull in combination with a shallow draft. The multifunctional tug is built for Towing, mooring, pushing, anchor handling, and dredging support operations. She is classed I  HULL  MACH Tug unrestricted service AUT-UMS.

The “Isa” has a length o.a. of 27.02 meters. She is width o.a. 9.10 meters and has a depth at half-length at sides of 3.60 meters. Her approx. draft aft is 2.63 meters. She has a grt. of 221 tonnes and has a displacement of 370 tons. The main power is provided by two Caterpillar 3512C TA/A diesel engines each developing 1,119 bkW (1,500 hp) at 1,600 rev/min. This is delivered to a two screw arrangement 2,100 mm Promarin fixed pitch propellers turning in Damen Marine Components “Optima” nozzles via Reintjes WAF665 gearboxes with reduction ratio of 5.95:1. On trails, this configuration gave the vessel an average bollard pull ahead of 40.2 tonnes with a maximum bollard pull of 41.2 tons and a free running speed of 11 knots. The 200 bhp bow thruster is hydraulically driven. The ISA has two Generator sets made Caterpillar C-4.4 TA units, each with an output of 86.3 kVA, 50Hz – 230/400V AC; A diesel drivene hydraulic set Caterpillar C-90 TA with a capacity of 269 kW at 1.,800 rpm. The fuel separator is from Westfalia type OTC-2. The transfer pumps for water and fuel are type SIHI with a capacity of 50m3/hr at 4.8 bar. The two Compressors has a capacity of 175 L/min each.

The deck machinery comprises a two DMT hydraulic driven Anchor Winches. Two Pool (HHP) anchors of 275kg each with a 19 mm short-link anchor chain 192.5m. The anchorhandling/towing winch is a DMT Waterfall execution, hydraulically driven winch with a towing pull capacity of 50 ton at 4.0 m/min pull, slack 0-23m/min and a holding power 125 ton. On the drum is a wire fitted with 850 mtrs in length and with a diameter of 40 mm. The anchor handling winch has a towing pull capacity of 100 ton at 2.8 m/min pull, slack 0-16/min and a holding power 125 ton. On her drum is a wire with a length of 650 mtrs and a diameter of 40 mm fitted. The deck crane is from HS Marine type AKC185/18.5 E4 with a lifting capacity of 5.5 tons at 18.5 mtrs. On the aft deck is a Dromec HPV-12000 tugger winch mounted with a capacity of 12 tons at 4,5m/min. Finally fitted on the vessels stern deck is a towing pin set type WK Hydraulics double pin type with chain stop.

The tug consist tanks for the following liquids; Fuel tanks capacity of 125.1 m3; Fresh water tanks with a capacity of 30 m3; Lubrication oil with a capacity of 3.9 m3; Hydraulic oil with a capacity of 1.5 m3; Gear oil with a capacity of 1.5 m3, Dirty oil tank with a capacity of 4.3 m3; Bilgewater tank with a capacity of 4.3 m3; Sewage tank with a capacity of 2.2 m3; and a Sludge tank with a capacity of 1.4 m3.

Nautical and Communication Equipment:
The bridge is equipped with extensive nautical and communication equipment. The nautical equipment consist two Radar system Furuno FAR-2117; an Anschuetz Standard 22 Compact Gyrocompass; a Magnetic compass Cassens & Plath Reflecta 1, a Furuno GP-150D-GPS; a Furuno FA-150 AIS; a Radio Zeeland Seapilot 76 Autopilot; a Furuno FE 700 Echo Sounder, a Furuno NX700 Navtex receiver; a Marble 421 Bridge watch alarm; two Pesch 2000W searchlights. The communication consist two Thrane & Thrane Sailor RT6222 VHF/DSC class A radio telephone; a Thrane & Thrane 6310 Single Side Band/DSC; a Speedlog Furuno DS-80; a Sigma 700 Intercom system; a Thrane & Thrane type TT-3000E Mini-C system GMDSS; a EPIRB jotron type Tron-40S and a Radar transponder Jotron type Tronsart.

Source by TUGS TOWING & OFFSHORE INDUSTRY NEWS