CATAMARAN CLASSES

BSC have two classes of catamaran hull design for passenger ferries:

 

 

 

 

1.    a fast displacement hull (E-class) for vessels over 25 metres; and

2.    a semi-displacement / semi-planing hull (Q-class) for vessels up to 25 metres.

Both hull classes were purpose developed as efficient low resistance hull forms for their design class. Design objectives extended from resistance and wave making to weight and trim analysis and to efficient propulsion systems. Towards meticulous execution of these aims hulls are streamlined with attention given to the smallest influence on vessel resistance with anodes and "P bracket" palm plates being recessed and R&D applied to transducer housings, underwater exhaust cowlings, stern tube protrusions, and sea chest grille design.

An E-class hull model was tank tested for wave making in Launceston prior to construction of a 26 metre prototype (MV-Suzanne ). The Q-class hull development was a thorough process culminating in the construction of a 25 metre prototype ( MV-Queenslander I ).

 

MONOHULL CLASSES

BSC have three general classes of MONOHULL hull forms each fit for purpose.

(i) a hard chine form with variable deadrise over plaing surface. (SP-class) This class is for fast "endurance" vessels with Froude number in planing range, however with displacement suggesting the vessel is in semi-displacement mode. The displacement / speed ratio does not require high deadrise aft of midships for wave load dampening.

(ii) high performance hard chine with constant high deadrise over planing surface. (HPP-class) (variations of this form include one or more steps in the hull).

(ii) round bilge displacement form generally suited for long range cruising at economical hull speed. (C-class)

 

BSC D02a id a fast monohull design is suitable for vessel requirements of 250 passengers and over with a practical minimum vessel length of 30 metres suggested for an efficient length/beam ratio. The design has a raked stem and deep forefoot flowing to a round bilge with fine half angle of entry. Reserve buoyancy forward is provided by a stepped chine / spray rail which proceeds aft to become the planing chine from about midships. The hull bottom from forward midships to transom has variable deadrise from deep forward to a relatively flat transom. Constant low angled buttock lines through the planing surface provide performance at speed whilst fine forward waterlines and the deep V forward contribute to good seakeeping and ride into a head sea.

BSC Design ref. D02_30m - 30 metre monohull passenger ferry

 

 

BSC catamaran ferry designs include:

 

 

BSC Design ref. D05_25c - 25 metre Q-class passenger ferry

 

 

 

 

 

 

 

 

 

 

 

 

BSC Design ref. D12_25c - 26 metre E-class passenger ferry

D12a - Design Features:

  1. Designed for operation in coastal/partially smooth waters, exposed to a significant wave height of 1.20 metres, the vessel features aluminium hulls, corrugated plate tunnel with good clearance, and fwd tunnel slamming protection.

  2. Good low wash characteristics with large passenger carrying capacity.

  3. A highly versatile and safe vessel for maximum functionality in commuter, tourist/sightseeing and charter operations.

  4. Excellent helm visibility of fwd boarding positions with CCTV system for viewing aft positions.

  5. Generous and easy access to main engines and gensets through independent hinged hatches.

  6. Upper observation deck passenger amenity with full walk around.

  7. Internal cabin Kiosk/Bar with display refrigerator and hot water facilities.

  8. Spacious aft deck for passenger seating and entertaining with BBQ facilities.

D12a - Design Information:

1.  Profile and General Arrangement

  1. Profile #1

  2. Profile #2 

  3. GA - Main deck 

  4. GA - Upper deck

  5. GA - Hulls

2.  Principal Particulars
3.  Power / Speed 
4.  Specifications

 

 

 

 

Design Features

 

 

 

 

BSC Design ref. D15_32c - 32 metre E-class passenger ferry