50m Multi-Mission Offshore Patrol Vessels, Philippines

50m multi-mission offshore patrol vessels

Two 50m multi-mission offshore patrol vessels are being constructed to enhance law enforcement capabilities of the Philippine Government.

Keels of both the vessels were laid at the Josefa Slipways shipyard in San Roque, Navotas city in the Philippines in January 2016.

The vessels are intended to perform patrol, surveillance, monitoring, protection, law enforcement and combating illegal fishing in territorial waters of the Philippines. They can also be used for disaster relief, rescue as well as for seaborne research operations.

The Bureau of Fisheries and Aquatic Resources (BFAR), an operating agency of the Philippines' Department of Agriculture (DA), invited bids for two 50m offshore patrol vessels in June 2015. The vessels, worth approximately P180m ($3.83m) each, will be operated by the Department of Agriculture, through the BFAR.

Incat Crowther, a naval architect based in Australia, was awarded a contract to design the two 50m ships in February 2016.

50m multi-mission vessel design and capacities

The vessel features a mono-hull made from steel and is classified by Philippine Maritime Industry Authority (MARINA). Its overall and waterline lengths are 50.5m and 48m respectively, draught of the hull is 1.95m and the maximum draught is 3.2m. The vessel has full load displacement of 120,000kg and operational lightship deadweight of approximately 45,500kg.

With a maximum deadweight of roughly 220,000kg, the vessel can carry up to 60 crew members, 55,000l of fresh water, 148,000l of fuel, and 8,000l each of grey water and black water.

Accommodation for rescue crafts and RHIB

The 50m multi-mission offshore patrol vessel has a spacious aft working deck to accommodate a rescue craft as well as a 9m rigid-hulled inflatable boat (RHIB). A deck crane is used to launch the rescue craft, and the RHIB is lowered into water through a specially-designed well with a transom door.

"The multi-mission offshore patrol vessel can reach up to a range of 1,000nm and has an autonomy of 30 days."

The main cabin features a medical clinic with adjacent lab, a private mess hall for officers, a big mess hall for the crew, as well as an ample galley with adjoining freezer and cold rooms. A conference room with a capacity of 36 personnel is located at the forward part of the main cabin. Area below the main deck accommodates up to 42 personnel, engine, control and equipment rooms.

The mid deck houses a conference room accommodating 14 personnel in the front section. It also accommodates officers and engineers.

The offshore vessel's wheelhouse is equipped with sleeping quarters for two operators and has a large desk area for electronics and charts. Its large front windows allow an unobstructed forward view.

Onboard equipment

Equipment onboard the 50m offshore vessel includes navigation and communications systems, marine radar, antennae, searchlight, deck machinery, and fire-fighting and life-saving appliances.

Propulsion and performance of 50m multi-mission patrol vessel

Two Mitsubishi S16R2-T2MPTK engines, each generating a power of 1,884kW at 1,500rpm, provide the vessel a service speed of 15kt and a maximum speed of 18kt. Each engine is coupled to a Masson MM W18000 gearbox and a fixed-pitch propeller.

Electric power is generated by two 240kW Yanmar 6HAL2-WHT generators with an additional emergency generator.

The multi-mission offshore patrol vessel can reach up to a range of 1,000nm and has an autonomy of 30 days.