5.1 Bridge Layout5.1.1 Sight5.1.1.1 Field of Vision
5.1.1.1.1 Minimum Field of
VisionThe view of the sea surface from
the navigating and manoeuvring workstation should not be obscured by
more than two ship lengths or 500 m, whichever is less, forward of
the bow to 10° on either side under all conditions of draught, trim
and deck cargo.
5.1.1.1.2
Field of Vision around the ShipThere should be a field of
vision around the vessel of 360° obtained by an observer moving
within the confines of the wheelhouse.
5.1.1.1.3 Navigating and Manoeuvring
WorkstationThe horizontal field of vision
from the navigating and manoeuvring workstation should extend over
an arc of not less than 225°, that is from right ahead to not less
than 22.5°, abaft the beam on either side of the ship.
5.1.1.1.4 Monitoring
WorkstationFrom the monitoring workstation,
the field of vision should extend at least over an arc from 90° on
the port bow, through forward, to 22.5° abaft the beam on starboard.
5.1.1.1.5 Bridge WingFrom each bridge wing the
horizontal field of vision should extend over an arc at least 225°,
that is at least 45° on the opposite bow through right ahead and
then from right ahead to right astern through 180° on the same side
of the ship.
5.1.1.1.6 Main Steering
PositionFrom the main steering position
(workstation for manual steering) the horizontal field of vision
should extend over an arc from right ahead to at least 60° on each
side of the ship.
5.1.1.1.7 Blind SectorsThe safe look-out from the
navigating and manoeuvring workstation should not be influenced by
blind sectors.
No blind sector
caused by cargo, cargo gear or other obstructions outside of the
wheelhouse forward of the beam which obstructs the view of the sea
surface as seen from the navigating and manoeuvring workstation,
should exceed 10°. The total arc of blind sectors should not exceed
20°. The clear sector between two blind sectors should be at least
5°. Over an arc from right ahead to at least 10° on each side, each
individual blind sector should not exceed 5°.
5.1.1.1.8 View of the Ship's SideThe ship’s side should be
visible from the bridge wing. Bridge wings should be provided out to
the maximum beam of the ship. The view over the ship’s side should
not be obstructed.
5.1.1.2
Windows5.1.1.2.1 Lower Edge of the
Front WindowThe height of the lower edge of
the front windows should allow a forward view over the bow for a
person in a sitting position at the workstation for navigating and
manoeuvring and the workstation for monitoring.
Within the required field of vision the
height of the lower edge of the windows above the bridge deck should
be kept as low as possible. In no case should the lower edge present
an obstruction to the forward view as described in 5.1.1.1.
5.1.1.2.2 Upper Edge of the
Front WindowThe upper edge of the front
windows should allow a forward view of the horizon for a person in a
standing position with an eye height of 1.800 mm above the bridge
deck at the navigating and manoeuvring workstation, when the ship is
pitching in heavy seas. If 1.800 mm eye height is unreasonable and
impractical, the eye height may be reduced, but not less than 1.600
mm.
5.1.1.2.3 Framing Between
WindowsFraming between windows should
be kept to a minimum and not be installed immediately forward of any
workstation, or the centre-line. If stiffeners between windows are
to be covered, this should not cause further obstructions of the
field of view from any position inside the wheelhouse.
5.1.1.2.4 Front Window
InclinationTo help avoid reflections, the
bridge front windows should be inclined from the vertical plane top
out, at an angle of not less than 10° and not more than 25°.
5.1.1.2.5 Rear and Side
Window InclinationTo help avoid reflections, rear
and side windows should be inclined from the vertical plane top out,
at an angle of not less than 10° and not more than 25°. Exceptions
can be made for windows in bridge wing doors.
5.1.1.2.6 Removable SunscreensTo ensure a clear view and to
avoid reflections in bright sunshine, sunscreens with minimum colour
distortion should be provided at all windows. Such screens should be
readily removable and not permanently installed.
5.1.1.2.7 Glass CharacteristicsPolarized and tinted windows
should not be fitted.
5.1.1.2.8 Clear ViewA clear view through at least
two of the bridge windows and, depending on the bridge
configuration, an additional number of windows with a clear view
should be provided at all times, regardless of the weather
conditions.
5.1.2
Arrangement5.1.2.1 Wheelhouse
DimensionsThe clear ceiling height in the
wheelhouse should be designed with regard to the installation of
overhead panels and devices. The clear height between the bridge
deck surface covering and the underside of the deck head beams
should be at least 2.25 m. The lower edge of deckhead mounted
equipment should be at least 2.1 m above the deck in open areas,
passageways and at standing workstations.
5.1.2.2 View of the area in front of the bridge
superstructureIt should be possible to watch
the area in front of the bridge superstructure from the wheelhouse.
5.1.2.2.1 Position close
to the Forward Centre WindowA position should be provided
close to the forward centre window.
If the view in the centre-line is obstructed by
large masts, cranes, etc., two additional positions giving a clear
view ahead should be provided, one on the port side and one on the
starboard side of the centre-line, no more than 5 m apart.
5.1.2.2.2 Access to Front
WindowA second close approach access
besides the position should be possible or the width of the position
should be sufficient to accommodate two persons.
5.1.2.3 Position of the Workstation for
Navigating and ManoeuvringThe workstation for navigating
and manoeuvring should be laid out if practicable, at the starboard
side close to the centre-line.
5.1.2.4 Position of the Workstation for Manual SteeringThe workstation for manual
steering should preferably be located on the ship’s centre-line. If
the view ahead is obstructed by large masts, cranes, etc., the
steering station should be located a distance to starboard of the
centre-line, sufficient to obtain a clear view ahead. If the
workstation for manual steering is located off the centre-line,
special steering references for use by day and night should be
provided, e.g. sighting marks forward.
5.1.2.5 Position of the Workstation for
MonitoringThe workstation for monitoring
should be laid out if practicable, at the port side close to the
centre-line.
5.1.2.6 Bridge
Wing CommunicationAn internal communication system
between the workstation for docking and the workstation for
navigating and manoeuvring should be provided when the distance
between the workstations is greater than 10 m. An internal
communication system should always be provided between the
workstation for navigating and manoeuvring and open bridge wings.
Where workstations are widely spread, internal communication systems
should be provided so that unhampered communications can be achieved
under all operating conditions. It is important that all
order/action communication systems be two-way.
5.1.2.7 DoorsAll wheelhouse doors should be
operable with one hand. Bridge wing doors should not be selfclosing.
Means should be provided to hold bridge wing doors open.
5.1.2.8 Portable ItemsPortable items, such as safety
equipment, tools, lights, pencils, should be stored at appropriate
places, specially designed wherever necessary.
5.1.3 Accessibility and Movement5.1.3.1 Clear RouteA clear route across the
wheelhouse from bridge wing to bridge wing should be provided. The
width of the passageway should be at le ast 1 200 mm.
5.1.3.2 Adjacent Workstation
DistancesThe distance between adjacent
workstations should be sufficient to allow unobstructed passage to
persons not working at the stations.
The free passage in passageways between different
workstation areas should be at least 700 mm. The workstation
operating area should be part of the workstation not of the
passageway.
5.1.3.3
Passageway DimensionsThe distance from the bridge
front bulkhead, or from any consoles or installations placed against
the front bulkhead, to any consoles or installations placed away
from the bridge front should be sufficient for two persons to pass
each other. The distance of a passageway between the front bulkhead
and any consoles should preferably be at least 1 000 mm, and not
less than 800 mm.