Second Baltic Workboats built Coast Guard patrol vessel has reached its home port in Oxelösund on the Easrt coast of Sweden.
It is the second ship in a series of five very advanced, versatile coastguard vessels, which are used primarily for maritime surveillance, border and fisheries control, environmental protection, fire-fighting and rescue and civil protection and diving operations.
After successful tender in 2009 Baltic Workboats was awarded the contract to design and build new fast patrol vessels for Swedish Coast Guard, with the requirement to have lowest possible lifecycle cost, high efficiency, high working environment standards and lowest possible environment effect.
The 26.5 meter KBV 313 design is based on Baltic Workboats successful Patrol 24 platform. Within design period apart else a full-scale hull optimization with model test and CFD calculations were carried out to give vessel lower resistance, better sea keeping and special hull shape for IPS installation. As result of these works propulsion resistance was lowered 15%.
FEM calculations were extensively used during hull structure design. To keep weight down and avoid welding's large part of hull was made of extruded aluminium panels.
Strict weight control was implemented during construction in order to achieve lowest possible total weight of the vessel. This was a significant challenge considering large amount of different equipment required on board.
To fulfill strict noise and vibration requirements, the whole lower accommodation is resiliently mounted, as is also the vessel’s wheelhouse. Low noise transmission between cabins is achieved by using high noise damping panels. As a result noise level at full speed in the wheelhouse was measured 55 dB whereas maximum noise level in accommodation areas was 63 dB.
To give the vessel best efficiency and overall performance Volvo Penta IPS 1050 complete propulsion system is installed. The system features triple D13-800 main engines with total power of 1764 kW and IPS 3 fully integrated pod units. Up to 40 % lower fuel consumption over the whole speed range is creating great cost savings and reduced CO2 and NOx emissions. During sea trials the vessel reached a speed of 33 knots fully loaded and the time to accelerate from idle to 20 knots was only 7.5 seconds.
The center main engine can be clutched out so that the engine power can be used to power the vessels fire pump with a capacity of 1800 l/min @10 bar. During firefight mode, the vessel can be maneuvered with the outer engines.
Steering of the vessel during docking and normal driving is done using a joystick instead of a steering wheel, altogether there are five control stations. The control system of the vessel is enhanced by a dynamic positioning system. Vessel has 10 ton bollard pull capability and as its hull is ice strengthened it has capability to operate in up to 5 cm ice.
KBV 313 is equipped with full ECDIS with radar overlay and 27” LCD screens on workstations. All navigation equipment is doubled and fully integrated in Conning system. All alarm and monitoring, alarm acknowledgement and electrical system is handled through the Integrated Alarm, Monitoring and Control System (IAMCS) display.
The KBV 313 is able to accommodate 5 crew members. High accommodation standard with single bed cabins and toilets is ensured. The HVAC system of the vessel was designed to according to DNV COMF-C(3) requirements and it features full air conditioning, overpressure ventilation system with waste heat recovery and carbon filter for work in contaminated air.
The KBV 313 deck equipment includes a 5.5m RIB boat, crane for lifting the RIB and other equipment, a rescue net, diving equipment as well as a FLIR camera for patrol and rescue operations.
Vessel is fully classified under Lloyds with class notation: 100A1 SSC Patrol Mono HSC G3 MCH UMS.