Japan's Daizo Corporation has delivered the tug Hirata Maru to the famous Naikai Tug Boat Service Co.
Also designed by Daizo, the vessel was constructed under survey to Japanese Government regulations and also features a coastal navigation notation.
The vessel has an overall length of 38.83 metres, a beam of 8.9 metres, a depth of 4.0 metres and a draught of 3.0 metres.
Japanese engine manufacturer Niigata supplied the vessel's propulsion package. This package comprises a pair of Niigata 6L28HX engines, each rated for 1,618kW, and each coupled to Niigata ZP-31 nozzle type propellers.
This propulsion system achieves a maximum speed of 15.2 knots and a bollard pull of 52 tones.
The vessel was designed for supporting assisting vessels to enter and leave Imabari Port, towing work in the coastal areas around Imabari, and acting as a fire-fighting asset for the port, including chemical fires.
Hirata Maru is equipped with two types of Kashiwa water cannon for fire-fighting duties. The first, with 3,000 litres per minute capacity, is the extending type equipped on the top of the mast. It is able to be extended up to 7.5 metres higher than the top of the mast and its firing range is 100 metres.
The other, with matching capacity, is a fixed type equipped on the top of the wheelhouse. A water curtain system is also equipped for self-protection against out-of-control fires.
| Hirata Maru | |
| SPECIFICATIONS | |
| Type of vessel: | Tug |
| Classification: | Japan Government |
| Port of registry: | Kobe |
| Flag: | Japan |
| Owner: | Naikai Tug Boat Service Co, Japan |
| Designer: | Daizo Corporation, Japan |
| CAD software: | AutoCAD |
| Builder: | Daizo Corporation, Japan |
| Construction material: | Steel |
| Plate cutting: | CNC plasma |
| Length overall: | 38.83 metres |
| Length waterline: | 35.00 metres |
| Length bp: | 32.00 metres |
| Beam: | 8.90 metres |
| Draught: | 3.00 metres |
| Depth: | 4.00 metres |
| Displacement: | 539t (full load) |
| Gross tonnage: | 223t (Japan domestic) |
| Main engines: | 2 x Niigata 6L28HX, each 1,617kW |
| Gearboxes: | 2 x Niigata |
| Propulsion: | 2 x Niigata ZP -31 |
| Generators: | 2 x Yanmar 6CHL-HTN, each 88.2kW |
| Maximum speed: | 15.2 knots |
| Cruising speed: | 14.5 knots |
| Bollard pull: | 52t |
| Batteries: | 2 x Exide Tec. 200Ah; 2 x 72Ah |
| Hydraulic equipment: | 2 x Marine Hydrotech Co. hydraulic cylinder brake system, each 784kN |
| Fire fighting equipment: | Kashiwa Co. |
| Fire pump and engine: | 400m3/h type 1 |
| Fire cannon: | 3,000L/min fixed water gun; 3,000L/min extending 7m water gun |
| Powder: | Nihon Dry Chemical 2,000kg + N2 bomb |
| Radar: | Furuno FAR-1417-20AF |
| Depth sounder: | Furuno GP-3700 |
| Radio: | Furuno FM-8900S |
| Satcom: | Furuno SC-30 |
| Autopilot: | Niigata |
| Compass: | 2 x Saura Magnet Compass |
| GMDSS: | Navtex A2 |
| GPS: | Furuno GP-3500 |
| AIS: | Furuno FA-170 |
| Winches: | 2 x Marine Hydrotech |
| Type of fuel: | HFO |
| Fuel capacity: | 42m3 |
| Fire form liquid: | 6m3 |
| Freshwater capacity: | 28m3 |
| Accommodation: | 5 |
| Crew: | 5 |
| Passengers: | 6 |
