8 Grouping of alarms and indicators
8.1 Where audible and visual alarms and indicators
are required at central positions, e.g. on the navigating bridge,
in the machinery space, or engine control room, the alarms and indicators
should be arranged in groups, as far as practicable, except emergency
alarms.
8.2 The scope of alarms and indicators will vary
with the type of ship and machinery. The basic recommendations given
in tables 8.1 through 8.3 should be
adhered to.
8.3 When visual alarms are grouped in accordance
with 2.10.2, individual alarms should be provided
at the appropriate position to identify the specific alarm condition.
8.4 The purpose of grouping is to achieve the
following:
-
.1 In general: to reduce the variety in type and
number of audible and visual alarms and indicators so as to provide
quick and unambiguous information to the personnel responsible for
the safe operation of the ship.
-
.2 On the navigating bridge:
-
.2.1 to enable the officer on watch to devote
full attention to the safe navigation of the ship;
-
.2.2 to readily identify any abnormal situation
requiring action to maintain the safe navigation of the ship; and
-
.2.3 to avoid distraction by alarms which require
attention but have no direct influence on the safe navigation of the
ship and which do not require immediate action to restore or maintain
the safe navigation of the ship.
-
.3 In the machinery space/engine control room,
to readily identify and locate any area of abnormal conditions (e.g.
main propulsion machinery, steering gear, bilge level) and to enable
the degree of urgency for remedial action to be assessed.
-
.4 In the engineers' public rooms and to each
of the engineers' cabins on ships where the machinery space/engine
control room is periodically unattended, to inform the engineer officer
on watch of any alarm situation which requires immediate presence
in the machinery space/engine control room.
Table 8.1 Grouping of alarms and
indicators: machinery space attended, remote control of the main propulsion machinery
from the navigating bridge not provided
|
Navigating bridge
|
Machinery space
|
One common audible device, except emergency alarms
(e.g.
buzzer, continuous)
|
Audible alarm devices in accordance with sections
4, 6 and 8.
|
|
1
|
2
|
3
|
|
Main steering position
|
Other locations on navigating bridge
|
Machinery space or control room
|
Individual visual alarms and
indicators for:
Each required steering gear:
- Power unit power failure
- Control system power failure
- Hydraulic fluid level alarm
- Running indication
- Alarm system failure alarm
Engine-room telegraph
Rudder angle
indicator
Propeller
speed/direction/pitch
Telephone call
|
Visual alarms and indicators at any
position on the navigating bridge other than the main steering position
for:
Required alarms and indicators, as indicated under
"Notes" in table 9.1.1
Any non-required alarm or indicator which the Administration
considers necessary for the officer on watch
Fire detection
alarm
|
Visual alarms and indicators grouped
at a position in the machinery space or, in the case of ships, provided with
a control room, in that control room. In complex machinery alarm
arrangements, due account should be taken of 8.4.3.
Alarms
and indicators as indicated under "Notes" in table 9.1.2
Engine-room telegraph
|
Table 8.2 Grouping of alarms and
indicators: machinery space attended, remote control of the main propulsion machinery
from the navigating bridge provided
|
Navigating bridge
|
Machinery space
|
One common audible alarm device, except emergency
alarms
(e.g. buzzer, continuous)
|
Audible alarm devices in accordance with sections
4, 6 and 8.
|
|
1
|
2
|
3
|
|
Main steering position
|
Other locations on navigating bridge
|
Machinery space or control room
|
Individual visual alarms and
indicators as in column 1 of table 8.1, plus:
Failure of remote
control for main propulsion machinery
Starting air low
pressure, when the engine can be started from the navigating
bridge
Propulsion control station in control
|
Visual alarms and indicators at any
position on the navigating bridge other than the main steering position as
in column 2 of table 8.1, plus:
Machinery alarm, if
provided
|
Alarms and indicators as in column 3
of table 8.1, plus:
Failure of remote
control for main propulsion machinery
Starting air low
pressure
Propulsion control station in
control
Indication of propulsion machinery orders from
navigating bridge
Alarms and indicators as indicated under
"Notes" in table 9.1.2
|
Table 8.3 Grouping of alarms and
indicators: machinery space unattended, remote control of the main propulsion
machinery from the navigating bridge provided
|
Navigating bridge
|
Machinery space
|
One common audible alarm device, except emergency
alarms
(e.g. buzzer, continuous)
|
Audible alarm devices in accordance with sections
4, 6 and 8
|
|
1
|
2
|
3
|
4
|
|
Main steering position
|
Other locations on navigating bridge
|
Machinery space or control room
|
Engineers' public spaces and accommodations
|
Individual visual alarms and
indicators as in column 1 of tables 8.1 and 8.2, plus:
Override of automatic
propulsion shutdown, if provided
|
Visual alarms and indicators at any
position on the navigating bridge other than the main steering position as
in column 2 of tables 8.1 and 8.2, plus:
Machinery space fire
detection alarm
Alarm conditions requiring action by or the
attention of the officer on watch on the navigating
bridge
Alarms and indicators as indicated under "Notes" in
table 9.1.1
|
As in column 3 of tables 8.1 and 8.2, plus:
Alarms as indicated under
"Notes" in table 9.1.2
Alarm system power failure alarm
|
Engineers'
alarm
Machinery space fire detection
alarm
Machinery alarmfootnote
Steering gear alarm (common)footnote
Machinery space bilge alarmfootnote
Alarm system power failure alarm
Alarms and
indicators under "Notes" in table 9.1.5
|
|
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