A Unique new Fireboat for the City of Chicago

The new fireboat sailed under its own power from Wheatley to Chicago through the Great Lakes.

 

The principal particulars of this new RAnger 2700 Class fireboat are as follows:

Length Overall - 27.42 metres (90')

Beam, Moulded - 7.62 metres (25')

Depth, Moulded - 3.71 metres (12'?2")

Maximum operating draft - 2.28 metres ( 7.5')

Maximum Air Draft - 4.87 metres (16')

 

 

Capacities are as follows:

Fuel oil - 15,708 litres (4,150 US gallons)

Potable water - 946 litres ( 250 US gallons)

Fire-fighting foam - 1,000 litres (1,000 US gallons)

Water ballast - 23,391 litres (6,180 US gallons)

 

 

As is immediately obvious from the photographs and accompanying General Arrangement drawing, this is a vessel for which the design was extremely customized to suit the operating environment. The fireboat was designed and built to operate year-round in Lake Michigan, the Chicago River, and surrounding harbours, which includes up to 30 cm (1') of first year ice. The combination of a very shallow operating draft and an equally limiting air draft presented a significant design challenge, especially regarding weight estimation: if too heavy the vessel would near the bottom of the shallow river; if too light it would run afoul of the numerous low height bridges that grace the Chicago River through downtown Chicago. The new fireboat will be used to respond to any firefighting, rescue, hazmat decontamination, dive support operations, and other waterway related responses.

 

As in the majority of fireboats, this vessel is set up as a "day-boat" with no crew living spaces. However the vessel provides support for the operating crew with well-equipped galley, mess and rest areas. Other major features include a dedicated EMS treatment space with a direct entry from the main deck, adjacent to which is a decontamination shower. A further EMS space is located below decks. Aft on the main deck there is a large equipment storage room which, amongst other items, houses 28 Eastern Aero Marine life rafts and 150 lifejackets for rescue purposes. Another storage space houses the SCUBA and SCBA gear. Due to the constraints on the design, many of these storage spaces are served by stainless steel roll-up doors on the sides of the deckhouse, providing large clear openings to each service or storage space.

The wheelhouse is designed to provide maximum possible visibility within the constrained geometry of the deckhouse. Sightlines forward and to the sides are excellent, but are more constricted looking aft. The wheelhouse has four distinct control centres, two for Navigation and control, and one each for Machinery Controls and Communications.

 

The Christopher Wheatley was built in accordance with American Bureau of Shipping regulations for Steel Vessels, but was not so classed. The vessel was also designed to comply with NFPA Type III Standards for fireboats.

 

The propulsion machinery consists of a pair of CAT C32 high-speed diesel engines each rated 1,081 kW at 2,300 rpm. These each drive a fixed pitch, 1371 mm diameter propeller through a ZF model W4610 reverse-reduction gearbox.

 

The fire-fighting capability is provided by two completely independent pump engines, also CAT model C32 diesels, each rated 745 kW at 1,800 rpm and driving an FFS model SFP250 x 350 fire pump, rated 1,590 m³ (7,000 US gallons) per hour at 10 bar (150 psi). There are four fire-fighting monitors:

Centre Forward - 22,710 Lpm (6,000 gpm)

P&S Forward - 11,355 Lpm (3,000 gpm)

Aft - 11,355 Lpm (3,000 gpm)