Mv Bornholm Express – A Fast 25 Knots 41 Metre Monohull

Date Author Address

January 2007 Jakob Pinkster

Deift University of Technology

Ship Hydromechanics Laboratory Mekelweg 2, 26282 CD Deift

Mv Bornholm Express - A Fast 25 Knots

41 Metre Monohull

by

Jakob Plnkster

Report No. 1503-P

2007

Published in Schip & Warf de Zee, )aunary 2007,

ISSN 0926-4213, Media Business Press, Rotterdam

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Marine Tech

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te-yens aan de TU Deift

Mv Bornholm Express, yard number

538101, is a ferry suitable for 245

passengers. The ferry operates on a

number of different routes between the Danish island Bornholm (different

ports Allinge and Gudhjem) to the

Danish island of Chritianse and to

Simrishamn in Sweden.

The new vessel was designed by

Wave-Master International in close

coopera-tion with Christiansøfarten. Damen

Shipyards carried out detailed design

and construction

engineering. The

complete vessel was delivered at the

yard to the owners after arriving as deck cargo on board of a heavy lift cargo

ves-sel in Copenhagen, April 2006. She

started service shortly thereafter on the ist ofJune 2006.

The Design Challenge

The main function of the Bornholm

Ex-press is to:

Maximise commuter carriage capacity i.e. passengers and small goods

Provide a comfortable and spacious

trip

Sail all year round in all conditions

Load, transport and discharge

com-muters and bicycles quickly via ramps Sail in a restricted sailing area

Possess a high degree of

manoeuvra-biity

The Vessel

The vessel's general design, as shown in

the GAP of the vessel, from bow to

stern is dominated by: Fore deck

Day passenger accommodations

(sit-Mv Bornholm Express being loaded on ship's deck in Singapore

OLM EXPRES5

ting space/bar etc.) along almost the

whole vessel's length

Bridge ontop of the passenger accom-modations placed at about one third of the vessel's length behind the bow Passenger space

Aft deck

The vessel is to be a 41 metre ROPAX monohull vessel type having both an

aluminium hull and an aluminium

superstructure,

capable of walk-on

walk-off ferry operations. The hull has a transom stern and sharp bow with raked

stem above the waterline, as per the

attached GAP.

The vessel has a triple screw installation and has its propulsion machinery

locat-ed aft.

The hull and superstructure are made

of marine grade aluminium. The hull is internally subdivided by seven transverse watertight

bulk-heads into the following

com-partments (from forward):

forepeak, bow thruster room,

void spa, void spa, engine

room, auxiliary engine room,

void space and steering gear

compartment. Separating the

starboard and centre engine

from the port side engine, a

longitudinal watertight bulk-head has been fitted in the en:

gine room to prevent cross

flooding and also act as a

smoke and flame division.

- There are no sleeping

accom-modations on board for either

passengers or the five crew

members.

The vessel's overall

appear-ance is similar to the latest

gen-eration of fast ferry vessels of

similar size and speed.

16 SCHIP&WERF do ZEE JANUtRI 2007

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Mv Bornholm Express

A Fast 25 Knots 41 Metre Monohull

On Friday 28th April 2006, Damen Shipyards Gorinchem delivered the 41 metre mv Bornholm Express

to her owner, Shipping Company Christiansøfarten, Denmark. Mv Bornholm Express is an aluminium

The multi knuckle mono-hull is manu-factured of aluminium plates and has a

transom stern and a raked bow.

Passenger Spaces & Ventilation

The lay-out of the passenger spaces and

wheelhouse is shown on the GAP.

The general lay-out of the passenger

25khts

2 xF P P (1 kW each)

2xCaterelÌar,ach:84 kWe)

spaces consists of one large area situated

on the main deck covering almost the

complete vessel length from stem to

stem. Passengers may board and

disem-bark using two side entrances (one on

PS and one on SB) on the main deck just

aft of mid ships. Ramps for boarding

and discharging passengers are supplied

by the shore side

as

they are not

part of the ship's

inventory. Upon stepping on board, passengers directly enter a 98 passenger seating space which is partly separated from passenger

space forward for

147 passengers by

a centre lying

kiosk. In between

these two seating

arrangements,

folded smoke

doors have been

the engine room air intakes (PS and SB). Across the ship's breadth seating

arrangements from aft to forehead is

generally3-5-3,

5,3-3,3-4-3,3-3 - 5,3-3,3-4-3,3-3 and finally going down to 5,3-3,3-4-3,3-3 - 5,3-3,3-4-3,3-3

with ample walking spaces between the blocks of seats. In the vicinity of the side

entrances there is ample space for a

number of wheelchairs which may be easily parked on either side beside the

five persons seating arrangement block.

Five toilets for passengers are situated aft of the passenger space of which one

is suitable for people in wheelchairs.

There is a separate toilet aft in the same area for the crew.

Behind the passenger space on the aft deck luggage lockers are available for

passengers as well as a number of bicy-cle racks.

Interesting to note is the fact that no less

than 66 outdoor seats are available for

passengers on the upper deck, generally

in a 3-3 configuration in the transverse

direction. This brings the amount of

seats available on board to a grand total

of 311 although the vessel is limited by

fitted alongside regulation to the carriage of a maximum

SCHIP&WERF do ZEE - JANUAAI 2007 17

"Tle tank capacities of the vessel (100%) are as follows

I orage capacity of marine diesel oil approx. 920m3 To'alJsiòrage capacity of fresh water approx. 1.00 m3

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of 245 passengers. The 66 seats are

pro-tected by the bridge and bulwarks aside

of the first six rows of seating.

The design and interior finish is of a

high and contemporary standàrd, where

care has been taken to minimise the

weight of lining, upholstery etcetera.

Internal webs, pillars and bulkheads

have been arrangedin such a way asto

minimise vibrations and to insure conti-nuity of strength.

The lay-out regarding the passenger

routing is arranged in such a way that

de- and embarkation times have bèen

kept to a minimum

Engine Installation

Not quite usual for this type of fast

ves-sel, the Bornholm Express has beenfit-ted out with three high speed main en gine installations. The propulsion

en-gines are placed in two engine rooms

(SB with one main engine and one gen-erator set and PS with two.main engines

and one generator set) A longitudinal

watertight bulkhead separates these two

engine rooms and also prevents cross

flooding andacts as a permanent smoke and flame division. Each main engine may easily be replaced via flush

hatch-ways which are fixed by bolts on the

main deck directly above each engine.

Each of the complete propulsion

sys-tems are directly coupled with the aid of

clutches and have been designed for

maximum performance with minimum environmental effects (fuel consump-tion andemissions).

The hull houses two resiliently

mount-ed Caterpillar C 32 high spemount-ed main

en-gines, output 1000 kW at 2250 rpm and

burning MDOfuel, drives afixedpitch

propeller via a ZF 3050 gearbox. The

reduction ratio is selected to meet the

ships performance

with

optimised propeller design free sailing. The shaft line has an incliñation of 12° with the horizontal line Just mn fron of the outer propellers an A-.brac.ket supports the

shaft. The ceñtre propeller andshaft

arrangemnentisprotected and supported

by a centre keel which runs from stem to

just in front of the centre propeller. The

oentre keel height increases from -fore to

aft from zero and gradually increases to

its maximum height at around mid

ships. Thç keel has a constant height

from around mid ships to just ahead of

the centre propeller.

Auxiliary Installation

As both main engines are fitted out with alternators, Bornholm Express has been

fitted out withtwo auxiliary generator

sets which are also the emergency

gen-erators. One gen set is placed in the SB

engine room and the other in the PS

engine room. Each gen set isplacedjust forward of each outer main engine and one is in service during normal sailing

conditions.

The following voltage systems are

in-stalled:

400 VAC/ 3-phase at 50 Hz, for

power supply;

230 VAC/ 3-phase at 50 Hz, for

light-ing, small systems and emergency

systems;

-24 VDC circuit for instruments.

All generátor engines have a keel cool-ing system, containcool-ing an engine driven

pump and closed freshwater - cooling system connected to a cooling channel

at the vessel's hulL

A stand-still heating- system is fitted for use:of the generators and main engines

There is no separate emergency/har-bour generator for the vessel due to the redundancy of generators on board and the short ferry distances sailed and the

short distance to the nearest port of

refimge.

Manoeuvring/Steering Gear

The vessel's-manoeuvrability is:guaran-teed using a combination of three sets of propeller and-single spadetype.stainless steel: double plate rudder and two fixed pitch bow thrusters.

The hydraulic

steering system is

powered by a hydraulic pump which is driven by the gearbox. In case of pump

failurethe system automatically switch-es over to a back-upsteering system.

For manoeuvring at slow speeds the

vessel is fitted with two bow thrusters

with tunnels integrated in the ships

con-struction and fitted with gratings at

both sides.

Deck Equipment

The anchor equipment and installation

is in accordance with the Classification

Societies regulationsand one high hold-ingpower anchor is fitted directly on the bow on the centre line of the vessel at a height at just about main deck level.

Safety Appliances

A number of life buoys are stored in

frames on the aft main deck, ori the fore

main deck and on the upper deck. Also life jackets are provided and stored in GRP boxes (2 fwd and 2-aft)and-also a

-nurnber oílifjackets are plad well

accessiblein a locker inthe wheelhouse. Strtictumi fire protection has been fitted

throughout the vessel as required by

Class and. DMA regulations

compris-ingof insulation to protect the variously categorized spaces.

Bridge Area

From-within the wheelhouse the helms-man has an excellent view over 360 de-grees-of the outside world. A console for

the navigational equipment, engine

in-stnmrnentation, radio equipment

etcetera clearly shows the statüs of

equipment and navigation on board.

The helnisman, the captain and the

en-gmneer areall comfortably seated thanks

to a pneumatic damping system

inte-grated in each seat, two at the main

steering position and one at -the -engi:

neers console just behind the

helms-man.

AnARVunitand-afanunitarefittedin

two

compartments just behind the

bridge.

In case of excessive sun, use may be

made of sun awning / blinds in the

bridge.

For the crew there is a-separate toileton board in the rear of the passenger space which is accessible from the accommo-dation- area-and viathe upper deck aft.

Further-on board is, amongst:others, an extensive list of navigation equipment

usual for this type of fast passenger

ferry.