9 Alarm and indicator locations
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - International Codes - Alarms and Indicators - Code on Alarms and Indicators, 1995 – Resolution A.830(19) - 9 Alarm and indicator locations

9 Alarm and indicator locations

  9.1 Required alarms and indicator type and location should be in accordance with tables 9.1.1 to 9.1.9.

  9.2 Applicable regulations in the IMO instruments referred to should be consulted for additional requirements.

Notes to be applied to tables 9.1.1 to 9.1.9:

(1) A - audible alarm (visual may be necessary in high-noise areas)

V - visual alarm

I - visual indicator

A, V - both audible and visual alarms should be provided

MI - measuring indicator

EM - emergency alarm

P - primary alarms and additional indicators

S - secondary alarms and additional indicators

(2) Cargo control station means a position from which the cargo pumps and valves can be controlled. If a central cargo control station is not provided, then the alarm or indicator should be located in a suitable position for the operator (such as at the equipment monitored).

(3) If a cargo control station is not provided, the alarm or indication should be given at the gas detector device readout location.

(4) Where the types of alarms are not specifically identified in the IMO instruments referred to, the recommendations of the IMO Sub-Committee on Bulk Chemicals are enclosed in the parentheses, e.g. (A, V).

Table 9.1.1 Location: navigating bridge

Priority IMO Instrument Function Type Notes
  SOLAS II-1      
P 29.11 Rudder angle indicator MI Column 1, table 8.1
P 29.5.2 Steering gear power unit power failure A, V Ditto
30.3
P 29.8.4 Steering control system power failure A, V Ditto
P 29.12.2 Low steering gear hydraulic fluid level A, V Ditto
P 30.1 Steering gear running I Ditto
P 30.3 Steering gear overload/no volts A, V Column 1, table 8.3
P 31.2.7 Propulsion machinery remote control failure A, V Column 1, table 8.2
49.5
P 31.2.9 Low propulsion starting air pressure A, V Ditto
49.7
P 52 Automatic propulsion shutdown override I Column 1, table 8.3
P 52 Automatic shutdown of propulsion machinery A, V Ditto
P 51.1.3 Fault requiring action by or attention of the officer on watch A, V Column 1, table 8.3 (machinery alarm including 53.4.2 and 53.4.3)
P 31.2.8 Propeller speed/ direction/ pitch MI Column 1, table 8.2
P 49.6 Propeller speed/ direction/ pitch MI Column 1, table 8.3
P 37 Engine-room telegraph I Ditto
P 15.9.2 Power available for watertight doors I Column 2, table 8.1
P 16.2 Watertight door position I Ditto; if central operating station is on navigating bridge.
15.6.5
15.11.1.1
P footnote15.6.4 Watertight door position I Column 2, table 8.1
15.8.2
16.2
P footnote15.7.3.1 Watertight door low hydraulic fluid level A, V Ditto
P footnote15.7.3.1 Watertight door low gas pressure, loss of stored energy A, V Ditto
footnote15.7.3.2
P footnote15.7.8 Watertight door electrical power loss A, V Ditto
P footnote21.1.6.2 High water level alarm A footnote, where required.
P footnote23-1.2 Watertight door position I Column 2, table 8.1 Recommended colours: red - door is not fully closed or not secured, green - door fully closed and secured.
P footnote23-2.1 Shell door position indicator I Column 2, table 8.1, passenger ships with ro-ro cargo spaces or special category spaces. Recommended colours: red - door is not fully closed or not secured, green - door fully closed and secured.
P footnote23-2.2 Water leakage detection indicator I Column 2, table 8.1, Passenger ships with ro-ro cargo spaces or special category spaces. For details see regulation 23-2.2. (see II-1/17-1)
S 31.2.5, 49.3 Propulsion control station in control I Column 1, table 8.2
P 51.2.2 Alarm system normal power supply failure A, V Column 2, table 8.3
         
  SOLAS II-2      
EM footnote 5.3.4.3 Local automatic halon release A, V Column 2, table 8.1
P 11.8, 14.2 Fire detection in automated or remotely controlled machinery space A, V Column 2, table 8.2
P 12.1.2 Fire detection or automatic sprinkler operation A, V Column 2, table 8.1
footnote 12.1.2.1
12.1.2.2
footnote 13.1.5
13.1.6
P 12.1.2 Fire detection system fault A, V Ditto
footnote 12.1.2.1
12.1.2.2
13.1.2
footnote 13.1.5
P footnote 13-1.1.3 Smoke detection system power loss A, V Ditto
P footnote, footnote 13-1.1.6 Smoke detection A, V, I Ditto
footnote,footnote 13-1.3.4
P footnote 5.3.3.8 Loss of halon container pressure A, V Ditto
P footnote 5.3.3.2 Halon system electric circuit fault or power loss A, V Ditto
P footnote 5.3.3.3 Halon system hydraulic or pneumatic pressure loss A, V Ditto
S 37.1.6.3 Loss or reduction of required ventilation I Ditto
38.3.3
53.2.3.3
S 37.1.2.2 Fire door position I Ditto
S 62.16.3.1 Inert gas supply main pressure MI Ditto; forward of non-return devices
S 62.16.3.1 Inert gas pressure MI Column 2, table 8.1. In slop tanks of combination carriers
         
  Resolution A.481(XII)      
P Annex 2, paragraph 7.3 Personnel alarm A, V Column 2, table 8.1
         
  SOLAS III      
S 15.9 Position of stabilizer wings I Ditto
         
  SOLAS V      
S 12(m) Pitch of lateral thrust propeller MI Column 1, table 8.1
         
  Gas or chemical codes     Column 2, table 8.1 for the following:
P IBC 15.2.4 High and low temperature of cargo and high temperature of heat-exchanging medium A, V Ammonium nitrate solution
BCH 4.19.4
P IBC 15.5.6 High temperature in tanks A, V, MI Hydrogen peroxide solution over 60% but not over 70%
BCH 4.20.6
P IBC 15.5.7 Oxygen concentration in void spaces A, V, MI Hydrogen peroxide solution over 60% but not over 70%
BCH 4.20.7
P IBC 15.8.23.1 Malfunctioning of temperature controls of cooling systems (A, V) footnote, propylene oxide
BCH 4.7.15(a)
P IGC 13.4.1 High and low pressure in cargo tank A, V High and low pressure alarms
GC 13.4.1
P IGC 13.6.4, 17.9 Gas detection equipment A, V  
GC 13.6.4, 17.11
P IGC 13.5.2 Hull or insulation temperature A, (V), MI footnote
GC 13.5.2
P IGC 17.18.4.4 Cargo high pressure, or high temperature at discharge of compressors A, V Methylacetylene-propadiene mixtures
GC 17.12.2(d)(iv)
P IGC 17.14.4.3 Gas detecting system monitoring chlorine concentration A, V footnote
GC 17.12.5(d)(iii)
P IGC 17.14.4.4 High pressure in chlorine cargo tank A (V) footnote
GC 17.12.5(d)(iv)
P IBC 15.5.18 High temperature in tanks A, V, MI  
BCH 4.20.19
P IBC 15.5.19 Oxygen concentration in void spaces A, V, MI  
BCH 4.20.20
P IBC 15.10.2 Failure of mechanical ventilation of cargo tanks (A, V) footnote
BCH 4.3.1(b)
P IBC 19.8.4 Low pressure in inerted cargo tanks A, V footnote
P IGC 5.2.1.7 Liquid cargo in the ventilation system (A, V)  
GC 5.2.5(b)
P IGC 8.4.2.1 Vacuum protection of cargo tanks (A, V) footnote
GC 8.4.2(a)
P IGC 9.5.2 Inert gas pressure monitoring (A, V) footnote
GC 9.5.2
P IGC 13.6.11 Gas detection equipment A, V footnote
GC 13.6.11
P IGC 17.14.1.4 Gas detection after bursting disk for chlorine (A, V) footnote
GC 17.12.5(a)(iv)
         
  SFV Protocol 1993      
  Chapter IV      
P 4(5)
8(1)(e)(iii) 		Machinery failure advance alarm A, V Column 1, table 8.3
Column 2, table 8.2
P 6(2) Oil-fired steam boiler low water level, air supply failure or flame failure A, V footnote Column 2, table 8.3
II-1/32.2 (see table 9.1.2)
P 8(1)(d) Propulsion control station in control I Column 1, table 8.2
II-1/32.2.5;
49.3
P 8(1)(e)(i)
8(1)(e)(ii) 		Propeller speed/direction/pitch MI Column 1, table 8.2
II-1/31.2.8
P 8(1)(g) Propulsion machinery remote control failure A, V Column 1, table 8.2
II-1/31.2.7
P 8(1)(h) Low propulsion starting air pressure A, V footnote Column 1, table 8.2
II-1/31.2.9
P 13(3) Rudder angle indicator A, V Column 1, table 8.1
II-1/29.11
P 13(4) Steering gear power unit power failure A, V Column 1, table 8.1
II-1/29.5.2
P 13(5) Steering gear running I Column 1, table 8.1
II-1/30.1
P 13(5) Steering gear overload/no volts A, V Column 1, table 8.1
II-1/30.3
P 15(5) Refrigerating machinery spaces alarm A, V Column 2, table 8.1
P 19(1) HP fuel oil pipe leakage A, V footnote Column 2, table 8.3
P 19(3) Fuel heating high temperature alarm A, V footnote Column 2, table 8.3
P 19(5) Fire detection alarm A, V Column 2, table 8.3
P 20(1) Bilge high water level alarm A, V Column 2, table 8.3
II-1/21.1.6.2 (now II-1/35-1)
P 22(2)a Essential and important machinery parameters A, V Column 2, table 8.3
II-1/51.1.1 (see table 9.1.2)
P 22(2)(d) Fault requiring action by or attention of the officer on watch A, V Column 1, table 8.3
(machinery alarm inc. 22(2)(c), 23(2), 23(3)(c) & 23(3)(d))II-1/51.1.3
P 22(3)(b) Alarm system normal power supply failure A, V Column 2, table 8.3
II-1/51.2.2
P 24 Automatic propulsion shutdown override I Column 1, table 8.3
II-1/52
P 24 Automatic shutdown of propulsion machinery A, V Column 1, table 8.3
II-1/52
         
  Chapter V      
P 14(2)(b) Fire detection or automatic sprinkler operation A, V Column 2, table 8.1
II-2/12.1.2.2
P 15(2)(b) Fire detection alarm A, V Column 2, table 8.1
II-2/40.3
II-2/13.1.6
         
  IGS      
S 3.14.11 Low water level alarm A, V  
         
  HSC Code      
P 7.7.1 Automatic smoke detection system in areas of major and moderate fire hazard and other enclosed spaces in accommodation not regularly occupied I footnote Column 2, table 8.2
P 7.7.1 Automatic smoke detection and fire detection (with detectors sensing other than smoke) in main propulsion machinery room(s) additionally supervised by TV cameras monitored from the operating compartment I Column 2, table 8.2
P footnote 7.7.2.1.2 Fixed fire detection and fire alarms systems' power loss or fault condition A, V Column 2, table 8.2
II-2/13-1.1.3
P footnote 7.7.2.1.4 Fire detection signal A Column 2, table 8.2
P 7.7.2.1.6 Fire detection manually operated call point section unit indicator A, V Column 2, table 8.3
II-2/13.1.6
II-2/13-1.1.6
P 7.7.3.1 Fire detection for periodically unattended machinery spaces A, V Column 2, table 8.3
II-2/14.2
S 7.8.1.2 Fire door position I Column 2, table 8.2
II-2/37.1.2.2
S 7.8.5.3 Loss or reduction of required ventilation I Column 2, table 8.2
II-2/37.1.6.3
S 7.9.3.3.3 Fire door closing I footnote Column 2, table 8.2
II-2/37.1.2.2
P 7.12 Zone ventilation fans control I footnote Manned control station
P 7.13.1 Manually operated sprinkler system alarms M, I footnote Column 2, table 8.2
P 7.15 Smoke detection system for cargo spaces I footnote Column 2, table 8.2
P 9.1.14 Liquid cooling system failure A, V footnote
P 9.2.1 Automatic fire detection system A, V Column 2, table 8.3
II-2/11.8; 14.2
P 9.2.1 Bilge alarm A, V Column 2, table 8.3
II-2/48.1; 48.2
P 9.2.1 Remote machinery alarm system A, V Column 2, table 8.3
P 9.4.2 Fuel line failure A, V Column 2, table 8.2
P 9.4.5 Lubricating oil pressure or level falling below a safe level A, V Column 2, table 8.2
P 9.5.6 Lubricating fluid supply failure or lubricating fluid pressure loss A, V Column 2, table 8.2
S 10.3.12 Unattended space bilge alarm V footnote Column 2, table 8.2
II-2/48.1
P 11.2.1 Failure of any remote or automatic control system A, V Column 2, table 8.3
P 11.4.1 Malfunction or unsafe condition A, V footnote Column 2, table 8.2
EM 11.4.1.1 Indication of conditions requiring immediate action A, V Column 2, table 8.2;
distinctive alarms in full view of crew members
P 11.4.1.2 Indication of conditions requiring action to prevent degradation to an unsafe condition V Column 2, table 8.2;
visual display to be distinct from that of alarms referred in 11.4.1.1
S 12.3.9 Emergency battery discharge I Column 2, table 8.2
II-1/42.5.3; 43.5.3
P 12.5.1 Steering system electric overload A, V footnote Column 2, table 8.2
II-1/30.3
P 12.5.2 Steering system electric phase failure A, V Column 2, table 8.2
II-1/30.3
S 12.6.3 Electrical distribution system low insulation level A or I footnote Column 2, table 8.2
II-1/45.4.2
P 13.7 Rudder angle indicator and rate-of-turn indicator I Column 2, table 8.2
5.4.3
II-1/29.11
V/12(n)
P 13.11.2 Propulsion indicator I Column 2, table 8.2
S 13.11.3 Emergency steering position compass reading indicator I Column 2, table 8.2
         
  1989 MODU Code      
S 7.4.1 Propeller pitch indicator I Column 2, table 8.1
S 7.4.2.5, 8.5.5 Propulsion station in control indication I Columns 1 & 3, table 8.2
II-1/31.2.5
49.3
P 7.4.2.7, 8.5.7 Propulsion machinery remote control failure A, V Column 1, table 8.2
II-1/31.2.7;
II-1/49.5
P 7.4.2.8 Propeller speed/direction/pitch. MI Column 1, table 8.2
II-1/31.2.8
P 7.4.2.9, 8.5.9 Low starting air pressure A, V Columns 1 & 3, table 8.2
II-1/31.2.9;
II-1/49.7
P 7.5.17 Rudder angle indicator. MI Column 1, table 8.1
II-1/29.11
P 7.6.1 Steering gear running I Columns 1 & footnote3, table 8.1
II-1/30.1
P 7.6.3 Steering gear phase failure/overload alarm A, V Column 1, table 8.3
II-1/30.3
P 8.5.8 Propeller speed/direction/pitch MI Column 1, table 8.3
II-1/49.6
P 8.7.1 Fault requiring attention A, V Column 1, table 8.3 including 8.3.5.1, 8.4.1, 8.8.6 and 8.9
II-1/51.1.3
P 8.7.3 Alarm system normal supply failure A, V Column 2, table 8.3
II-1/51.2.2
P 9.7.1 Fire detection system alarm A, V Column 2, table 8.1
II-2/13
P 9.8 Gas detection and alarm system A, V footnote Column 2, table 8.1

Table 9.1.2 Location: machinery space/ machinery control room

Priority IMO Instrument Function Type Notes
  SOLAS II-1      
P 29.12.2 Low steering gear fluid level A, V Column 3, table 8.1
P 30.1 Steering gear running I Ditto
P 30.3 Steering system electric phase failure or overload A, V Ditto
P 31.2.7 Propulsion machinery remote control failure A, V Column 3, table 8.2
49.5
P 31.2.9 Low propulsion starting air pressure A, V Ditto
49.7  
P 32.2 Oil-fired boiler low water level, air supply failure, or flame failure A, V Column 3, table 8.1
P 32.3 Propulsion boiler high water level A, V Ditto
S 31.2.5 Propulsion control station in control I Column 3, table 8.2
49.3
P 37 Engine-room telegraph I Column 3, table 8.1
S 31.2.4 Propulsion machinery orders from bridge I Column 3, table 8.2
49.2
P 47.1.1 Boiler and propulsion machinery internal fire A, V Column 3, table 8.3
47.1.2
P 47.2 Internal-combustion engine monitors MI Ditto
P 48.1, 48.2 Bilge monitors A, V Ditto
P 51.2.2 Alarm system normal power supply failure A, V Ditto
P 53.4.3 Essential and important machinery parameters A, V Column 3, table 8.3 (machinery alarm)
51.1.1
S 42.5.3 Emergency battery discharge I Column 3, table 8.1
43.5.3
P 52 Automatic shutdown of propulsion machineryColumn 3, table 8.1 A, V Column 3, table 8.3
P 52 Automatic propulsion shutdown override I Ditto
P 53.4.2 Automatic change-over of propulsion auxiliaries A, V Ditto
S 45.4.2 Electrical distribution system low insulation level A or I footnote, Column 3, table 8.1
         
  SOLAS II-2    
P 5.3.3.2 Halon system electric circuit fault or power loss A, V Column 3, table 8.1
P 5.3.3.3 Halon system hydraulic or pneumatic pressure loss A, V Ditto
P 11.8 Fire detection in automated or remotely controlled machinery space A, V Column 3, table 8.2
14.2
P 15.5.1 High-pressure fuel oil leakage A, V Column 3, table 8.3
P 15.5.3 Service fuel oil tank high temperature A, V Ditto
P 62.19.6 Inert gas system: A, V Column 3, table 8.1
62.19.1.1
  • low water pressure/flow
62.19.1.2
  • high water level
62.19.1.3
  • high gas temperature
62.19.1.4
  • blower failure
62.19.1.5
  • oxygen content
   
62.19.1.6
  • power supply failure
   
62.19.1.7, 62.19.7
  • water seal low level
   
62.19.1.8, 62.19.8
  • low gas pressure
   
62.19.1.9
  • high gas pressure
   
62.19.2 gas generator failure:    
62.19.2.1
  • low fuel supply
   
62.19.2.2
  • power supply failure
   
62.19.2.3
  • control power failure
   
S 62.16.3.2 Inert gas O2 content MI Ditto
  Gas or chemical codes      
P IGC 16.3.1.1 Loss of inert gas pressure between pipes A, V footnote, Column 3, table 8.1
GC 16.2(a)
P IGC 16.3.10 Cargo gas/fuel system gas detection A, V footnote, Ditto
GC 16.10
P IGC 16.3.1.2 Flammable gas in ventilation duct (A, V) footnote, Ditto
GC 16.2(b)
P IGC 16.3.4 Flammable gas in ventilation casing (A, V) footnote, Ditto
GC 16.5
         
  Resolution A.481(XII)      
P Annex 2, paragraph 7.3 Personnel alarm A, V Column 3, table 8.1
         
  SFV Protocol 1993      
  Chapter IV      
P 6(2) Oil-fired steam boiler low water level, air supply failure or flame failure A, V footnote II-1/32.2
P 8(1)(e)(iii) Machinery failure advance alarm A, V footnote
S 8(1)(d) Propulsion control station in control I Column 3, table 8.2
II-1/31.2.5
49.3
P 8(1)(g) Propulsion machinery remote control failure A, V footnote Column 3, table 8.2
II-1/31.2.7
P 8(1)(h) Low propulsion starting air pressure A, V footnote Column 3, table 8.2
II-1/31.2.9
S 15(4)(b) Refrigerant leak alarm A, V  
S 17(6) Emergency battery discharge I footnote Column 3, table 8.1
II-1/42.5.3
S 18(4)(b) Electrical distribution system low insulation level A or I footnote Column 3, table 8.1
II-1/45.4.2
P 19(7) Internal-combustion engine monitors MI Column 3, table 8.3
II-1/47.2
P 22(2)(a) Essential and important machinery parameters A, V Column 3, table 8.3
II-1/51.1.1
P 22(3)(b) Alarm system normal power supply failure A, V Column 3, table 8.3
II-1/51.1.1
P 23(2) Automatic changeover of propulsion auxiliaries A, V Column 3, table 8.3
II-1/53.4.2
P 24 Automatic shutdown of propulsion machinery A, V Column 3, table 8.3
II-1/52
P 24 Automatic propulsion shutdown override I Column 3, table 8.3
II-1/52
         
  IGS      
S 3.14.11 Low water level alarm A, V Column 3, table 8.1
II-2/62.19.1.7
         
  MARPOL 73/78 Annex I      
P 16(5) (now 14) Alarm for excessive oil content in oily mixture discharge into the sea A, V footnote
         
  HSC Code      
P 7.7.2.1.4 Fire detection signal A, V Column 3, table 8.2
P 7.7.3.1 Fire detection for periodically unattended machinery spaces A, V Column 3, table 8.3
II-2/14.2
P 9.2.1 Automatic fire detection system A, V Column 2, table 8.3
II-2/11.8; 14.2
P 9.2.1 Bilge alarm A, V Column 2, table 8.3
II-2/48.1; 48.2
P 9.2.1 Remote machinery alarm system A, V Column 2, table 8.3
P 9.4.2 Fuel line failure A, V Column 3, table 8.2
P 9.4.5 Lubricating oil pressure or level falling below a safe level A, V Column 3, table 8.2
P 9.5.6 Lubrication fluid supply failure or lubricating fluid pressure loss A, V Column 3, table 8.2
S 10.2.7.3 High temperature alarm (oil fuel or settling tank) V footnote
S 10.3.12 Unattended space bilge alarm V footnote Column 3, table 8.2
II-1/48.1
P 11.2.1 Failure of any remote or automatic control system A, V Column 2, table 8.3
P 11.4.1 Malfunction or unsafe condition A, V footnote Column 3, table 8.2
P 11.4.1.3 Indication of conditions in 11.4.1.1 requiring immediate action A, V  
P 11.4.1.3 Indication of conditions in 11.4.1.2 requiring action to prevent degradation to an unsafe condition A, V Column 3, table 8.2; visual display to be distinct from that of alarms referred in 11.4.1.1
P 11.5 Shutdown system activation A, V footnote Column 3, table 8.2
P 12.5.1 Steering system electric overload A, V footnote Column 3, table 8.2
II-1/30.3
P 12.5.2 Steering system electric phase failure A, V Column 3, table 8.2
II-1/30.3
S 12.6.3 Electrical distribution system low insulation level A or I footnote Column 3, table 8.2
II-1/45.4.2
         
  1989 MODU Code      
P 4.2.7 Machinery failure pre-alarm A, V footnote Column 3, table 8.1
P 4.5.2 Manual overriding of the automatic control indicator I Column 3, table 8.1
S 5.3.12 Emergency battery discharge I Column 3, table 8.1
II-1/42.5.3
S 5.5.7 Electrical distribution system low insulation level A or I footnote Column 3, table 8.1
II-1/45.4.2
P 7.3.1 Water tube boiler high water level alarm A, V Column 3, table 8.1
S 7.4.2.4
8.5.4 		Propulsion machinery orders from bridge I Column 3, table 8.2
II-1/31.2.4
II-1/49.2
S 7.4.2.5
8.5.5 		Propulsion station in control indication I Columns 1 & 3, table 8.2
II-1/31.2.5
II-1/49.3
P 7.4.2.9 Low starting air pressure A, V Columns 1 & 3, table 8.2
II-1/31.2.9
P 7.6.1 Steering gear running I Columns 1&footnote 3, table 8.1
II-1/30.1
P 8.3.1 HP fuel oil pipe leakage A, V footnote Column 3, table 8.3
II-2/15.5.3
P 8.3.3 Fuel heating temperature alarm A, V footnote Column 3, table 8.3
II-2/15.5.3
P 8.3.6 Fire detection alarm for boiler/propulsion machinery A, V footnote Column 3, table 8.3
II-1/47.1
P 8.3.7 Internal-combustion engine monitors MI Column 3, table 8.3
II-1/47.2
P 8.5.7 Propulsion machinery remote control failure A, V Column 3, table 8.3
II-1/49.5
P 8.7.1 Fault requiring attention A, V At a normally manned control station in addition to main machinery control station including 8.3.5.1, 8.4.1, 8.8.6 and 8.9
II-1/51.1
P 8.8.3 Automatic change-over of propulsion auxiliaries A, V Column 3, table 8.3
II-1/53.4.2

Table 9.1.3 Location: central fire control station where provided

Priority IMO Instrument Function Type Notes
  SOLAS II-2      
EM footnote 5.3.4.3 Local automatic halon operation A, V  
P footnote 5.3.3.8 Loss of halon container pressure A, V  
P footnote 11.8 Fire detection in automatic or unattended machinery space A, V  
14.2
S 12.2.3 Automatic sprinkler system pressure MI  
P 12.1.2 Fire detection or automatic sprinkler operation A, V  
footnote 12.1.2.1
footnote 13.1.5
  13.1.6      
P 12.1.2 Fire detection system fault A, V  
footnote 12.1.2.1
  13.1.2      
  footnote 13.1.5      
P footnote,footnote 13-1.1.3 Smoke detection system power loss A, V  
P footnote,footnote 13-1.1.6 Smoke detection A, V, I  
footnote,footnote 13-1.3.4
         
  SFV Protocol 1993      
  Chapter V      
S 14(3)(c) Automatic sprinkler system pressure MI II-2/12.2.3
         
  HSC Code      
P footnote 7.7.2.1.2 Fixed fire detection and fire alarm systems' power loss or fault condition A, V Column 2, table 8.2
II-2/13-1.1.3
P footnote 7.7.2.1.4 Fire detection signal A, V Column 2, table 8.2
         
  1989 MODU Code      
P 9.7.1 Fire detection system A, V, I II-2/13
P 9.8.1 Gas detection and alarm systems A, V footnote

Table 9.1.4 Location: at the equipment or at the location being monitored

Priority IMO Instrument Function Type Notes
  SOLAS II-1      
P 29.11 Rudder angle indicator MI  
S 17.9.2.1 (now II-1/15.8) Shell valve closure I  
17.9.3 (now II-1/15.8)
S 32.6 Water level of essential boiler MI  
EM 15.9.1 Watertight door closing A footnoteDistinct from other alarms in area; in passenger areas and high noise areas, add intermittent visual alarm.
footnote15.7.1.6 (now II-1/13.7)
P footnote15.7.3.2 (now II-1/13.7) Watertight door loss of stored energy A, V At each local operating position
S 33.3 Steam pressure MI  
         
  SOLAS II-2      
EM 5.3.4.3 Local automatic halon release A, V Outside each access to the protected space
EM 5.1.6 Release of fire-extinguishing medium A  
63.1.1.1
IBC 11.2.1.2
BCH 3.13.3(b)
P 5.3.3.8 Loss of halon container pressure A, V  
S 12.2.3 Automatic sprinkler system pressure MI At each section stop valve
S 12.4.1 Automatic sprinkler system tank level MI  
S 15.2.6 Fuel oil tank level MI If provided
S footnote 15.2.6.1.1 Fuel oil tank level MI  
footnote 15.2.6.2
S 62.5 Flue gas isolating valve open/closed I  
S 62.15 Inert gas discharge temperature/pressure MI Measured at discharge of gas blower
         
  Gas or chemical codes      
P IBC 19.4.5 High temperature on outside furnace surfaces of incinerator (A, V)
MI 		footnote
P IGC 9.5.1 Content of oxygen in inert gas/trace of oxygen in nitrogen (A, V)
MI 		footnote
GC 9.5.1
S IGC 3.6.3 Warning on both sides of the airlock A, V  
GC 3.6.3
S IGC 8.2.8.2 Indicates which one of the pressure relief valves is out of service I  
GC 8.2.8(b)
EM IGC 11.5.2 Inerting/extinguishing medium release A Gas-dangerous enclosed spaces
GC 11.5.2
S IGC 13.4 Cargo pressure MI Local gauges required by 13.4.1, 13.4.2, 13.4.3 and 13.4.4
P IGC 13.6, 17.9 Gas detection equipment A, V  
GC 13.6, 17.11
         
  SFV Protocol 1993      
  Chapter II      
S 13(1) Shell valve closure A, V II-1/17.9.2.1 (now II-1/15.8)
S 13(2) Shell valve closure A, V II-1/17.9.3 (now II-1/15.8)
         
  Chapter IV      
S 11(7) Collision bulkhead valve closure I II-1/21.2.12 (now II-1/35-1)
S 13(3) Rudder angle indicator MI  
S 15(4)(a) Refrigerant leak indicator I  
P 15(5) Refrigerating machinery spaces alarm A, V At escape exits
         
  Chapter V      
S 14(3)(c) Automatic sprinkler system pressure MI At each section stop valve
II-2/12.2.3
S 14(5)(a) Automatic sprinkler tank level MI II-2/12.4.1
P 15(2)(b) Fire detection alarm A To ensure fire alarm sounding on the deck where the fire is detected
         
  IGS      
S 3.15.3.2.1 Effluent drain valve position indicator I footnote
S 6.2 Tank pressure sensors MI footnote
         
  VEC systems      
S 2.3.1 Isolation valve position indicator I  
P 2.4.1.3 Liquid level indicator MI At the location where cargo transfer is controlled
P 2.4.1.4 Liquid level indicator MI Portable gauging device on the tank
P 3.2.1.3 Cargo vapour shutoff valve position indicator I Near terminal vapour connection
P 3.3.3 Termianl vapour pressure sensing device MI footnote (3)
P 3.3.3.2 Termianl vapour pressure alarm A, V footnote (3)
P 3.3.3.3 Signal for sequential shutdown of onshore pumps and remotely operated cargo vapour shutoff valve (A, V) footnote (3)
         
  IMDG Code
(vol I)
(Amdt. 27) 		     
S 21.4.4 Cargo control temperature less than +25°C A, V footnote, Alarms independent of power supply of the refrigeration system
         
  HSC Code      
EM 7.7.6.1.6 Release of fire-extinguishing medium A Spaces in which personnel normally work or to which they have access
II-2/5.1.6
EM 7.9.3.3.2 Fire door closing A Sounding alarm before the door begins to move and until completely closed
S 7.13.1 Manually operated sprinkler system alarms M, I footnote Column 2, table 8.2
S 10.9.5 Bilge cocks and valve position indication I To indicate open or closed position
         
  1995 Diving Code      
P 2.5.3 Diving bell internal pressure MI footnote At the location of the attendant monitoring diving operations
P 2.5.5 Diving bell, etc. overpressure alarm A, V footnote At the location of the attendant monitoring diving operations
P 2.9.3 Diving equipment fire detection alarm A, V footnote At the location of the attendant monitoring diving operations
         
  1989 MODU Code      
S 3.6.4.2 Watertight doors and hatch cover positions alarm A, V  
S 4.3.5 Water level of essential boiler MI II-1/32.6
S 4.4.3 Steam pressure MI II-1/33.3
S 4.8.6 Bilge valve indicator I II-1/21.2.12 (now II-1/35-1)
S 4.9.8 Ballast valve position indicator I  
S 4.11.11 Cable tension, windlass power load and amount of cable paid out I  

Table 9.1.5 Location: engineers' accommodation

Priority IMO Instrument Function Type Notes
  SOLAS II-1      
P 38 Engineers' alarm A Column 4, table 8.3
P 51.1.2 Fault requiring attention of the engineer on duty A, V Ditto (machinery alarm)
51.1.5
         
  SOLAS II-2      
P 11.8 Fire detection in automated or remotely controlled machinery space A, V Ditto
14.2
         
  Resolution A.481(XII)      
P Annex 2, paragraph 7.3 Personnel alarm A, V Column 4, table 8.3 (when the navigating bridge is unmanned)
         
  SFV Protocol 1993      
  Chapter IV      
P 14 Engineers' alarm A Column 4, table 8.3
II-1/38
P 22(2)(b) Fault requiring attention of engineer on duty A, V Column 4, table 8.3
II-1/51.1.2; II-1/51.1.5
22(2)(c)
         
  HSC Code      
P 7.7.3.1 Fire detection for periodically unattended machinery spaces A, V Column 4, table 8.3
II-2/14.2
         
  1989 MODU Code      
P 7.8 Engineers' alarm A Column 4, table 8.3
        II-1/38
P 8.7.1 Fault requiring attention A Activate engineers' alarm required by 7.8 including 8.3.5.1, 8.4.1, 8.8.6 and 8.9
II-1/51.1.5

Table 9.1.6 Location: miscellaneous

Priority IMO Instrument Function Type Notes
  SOLAS II-1      
P 15.6.5 Watertight door position I At operating stations from which the door is not visible.footnote
At all remote operating positions
footnote15.6.4
S 21.2.12 (now II-1/35-1) Bilge cocks and valves position I At their place of operation
         
  SOLAS II-2      
P 12.1.2.2 Fire detection or automatic sprinkler operation A, V On cargo ships, alarm at attended location other than navigating bridge
P 11.8 Fire detection in automated or unattended machinery space A, V Alarm at attended location when navigating bridge is unmanned
14.2
P 40.3 Fire detection alarm A, V Alarm at location easily accessible to crew at all times
13.1.6
EM 40.4 Fire (special alarm to summon crew) A May be part of general emergency alarm
EM 13.1.4 Fire detection alarm not receiving attention A Alarmed to crew; may be part of general emergency alarm
P 59.3.3 Flammable vapour monitoring MI  
         
  SOLAS III      
EM 6.4.2, 50 General emergency alarm A Throughout all the accommodation and normal crew working spaces
         
  SFV Protocol 1993      
  Chapter II      
P 2(6) Watertight door position I At remote operating position
II-1/15.6.4
P 4(1) Freezer room weathertight door position A, V footnote At the attended location
         
  Chapter IV      
P 15(5) Refrigerating machinery spaces alarm A, V At an attended location (control station)
P 19(5) Fire detection alarm A, V At appropriate spaces when the vessel is in harbour
P 20(1) Bilge high-water level alarm A, V At places where continuous watch is maintained when navigating bridge not manned
II-1/21.1.6.2 (now II-1/35-1)
         
  Chapter V      
P 14(2)(b) Fire detection or automatic sprinkler operation A, V Alarm at location easily accessible to crew at all times
II-2/12.1.2.2
P 15(2)(b) Fire detection alarm A, V Alarm at location easily accessible to crew at all times
II-2/40.3
II-2/13.1.6
         
  Chapter VIII      
EM 2(1) General emergency alarm A Throughout all the accommodation and normal crew working spaces
III/6.4.2; 50
         
  Nuclear Merchant Ship Code      
P 3.9.3 Spaces containing NSSS safety equipment fire detection alarm A, V footnote Alarm at main control position and emergency control position
P 6.4.3 Controlled areas indication of radiation levels and airborne contamination I At main control position
P 6.10.2 Containment structure purge system radioactivity alarm A, V At main control position
P 6.10.4 Controlled and supervised areas exhaust for radioactivity alarm A, V At main control position
         
  HSC Code      
EM 4.2.1 General emergency alarm A Clearly audible throughout all the accommodation and normal spaces and open decks
8.2.2.2
III/6.4.2; III/50
P 7.7.2.1.4 Fire detection signal A Clearly audible throughout the crew accommodation and service spaces
P 7.7.2.1.6 Fire detection manually operated call point section unit indicator A, V Alarm at location easily accessible to crew at all times
II-2/13.1.6
         
  1989 MODU Code      
S 3.6.2 Watertight boundary valve position indicator I At the remote control station
P 4.3.2 Oil-fired boiler low-water level, air supply failure or flame failure A, V Alarm at an attended location II-1/32.2
S 4.8.1 Presence of water indicator I  
S 4.11.12 Cable tension and speed and direction of wind I At a manned station
S 6.3.1.1.3 Loss of ventilation A, V At a manned station
S 6.3.1.2.3 Loss of ventilation A, V At a manned station
S 6.3.1.3.3 Loss of ventilation overpressure A, V At a manned station
P 8.7.1 Fault requiring attention A, V Including 8.3.5.1, 8.4.1, 8.8.6 and 8.9
II-1/51.1
P 9.7.1 Fire detection system alarm A, V At alarm location easily accessible to crew at all times
II-2/13.1.6
EM 9.7.1 Fire detection alarm not receiving attention A Alarmed to crew, may be part of general emergency alarm
II-2/13.1.4
P 9.8 Gas detection and alarm system A, V footnote Alarm at a location easily accessible to crew at all times
EM 10.16.1 General emergency alarm A Clearly perceptible in all parts of the unit
III/6.4.2; III/50
         
  1995 Diving Code      
P 2.5.2 Compression chamber internal pressure MI At central control position
P 2.5.3 Diving bell external pressure MI Within the bell
P 2.9.3 Diving equipment fire detection alarm A, V footnote At an attended location other than the above
P 2.11.2 Compression chamber/diving bell parameters MI At central control position
P 2.11.3 Diving bell oxygen and CO2 levels MI Within the bell

Table 9.1.7 Location: cargo control station

Priority IMO Instrument Function Type Notes
SOLAS II-2      
P footnote 59.1.6 Cargo tank high level alarm and gauging A, I footnote, if required
S 62.16.1.1 Inert gas pressure MI  
62.16.2
S 62.16.1.2 Inert gas O2 content MI  
62.16.2
P 62.19.6 Inert gas system: A, V  
62.19.1.1
  • low water pressure/flow
62.19.1.2
  • high water level
62.19.1.3
  • high gas temperature
62.19.1.4
  • blower failure
62.19.1.5
  • oxygen content
   
62.19.1.6
  • power supply failure
   
62.19.1.7, 62.19.7
  • water seal low level
   
62.19.1.8
  • low gas pressure
   
62.19.8, 62.19.1.9
  • high gas pressure
   
62.19.2 Gas generator failure:    
62.19.2.1
  • low fuel supply
   
62.19.2.2
  • power supply failure
   
62.19.2.3
  • control power failure
   
  Gas or chemical codes      
P IBC 8.1.2 High level of the liquid in any tank A, V footnote, (2)
BCH 2.13.1
S IBC 15.10.2 Failure of mechanical ventilation system for maintaining low gas concentration in cargo tanks A, V footnote, sulphur liquid
BCH 4.3.1(b)
P IBC 15.19.2 Power failure on any system essential for safe loading A, V footnote, (2)
BCH 4.14.3
P IBC 15.19.6 High level alarm, cargo tank A, V footnote, (2)
BCH 4.14.1
S IGC 13.2.1 Cargo level MI (2)
GC 13.2.1
P IGC 13.4.1 High and low pressure in cargo tank (A, V), MI (2)
GC 13.4.1
P IGC 13.6.4, 17.9 Gas detection equipment A, V (3)
GC 13.6.4, 17.11
P IGC 17.18.4.4 Cargo high pressure, or high temperature at discharge of compressors A, V (2), Methylacetylene-propadiene mixtures
GC 17.12.2(d)(iv)
S IGC 10.2.2 Shutdown of submerged cargo pumps (A, V)  
GC 10.2.2
P IGC 17.14.4.3 Gas detecting system monitoring chlorine concentration A, V footnote, (3)
GC 17.12.5(d)(iii)
P IGC 17.14.4.4 High pressure in cargo tanks (chlorine) A, (V) footnote, (2)
GC 17.12.5(d)(iv)
P IGC 13.3.1 High liquid level in cargo tank A, V footnote, (2)
GC 13.3.1
S IGC 13.5.1 Cargo temperature MI footnote, (2)
GC 13.5.1
P IGC 13.5.2 Hull or insulation temperature MI, A, (V) footnote
GC 13.5.2
P IGC 13.5.3 Cargo tank temperature MI footnote, (2)
GC 13.5.3
P IGC 13.6.11 Gas detection equipment A, V, MI footnote, (3)
GC 13.6.11
P IGC 17.14.1.4 Gas detection after bursting disk for chlorine (A, V)
MI 		footnote, (2)
GC 17.12.5(a)(iv)
P IBC 10.2.2.1 Shutdown of submerged cargo pumps (A, V) footnote
P IBC 15.7.10 High level of phosphorus (A, V) footnote, (2)
BCH 4.5.10
P IBC 15.19.7.2 Overflow alarm A, V footnote
BCH 4.14.2(b)
P IGC 5.2.1.7 Liquid cargo in the vent system (A, V) footnote, (2)
GC 5.2.5(b)
P IGC 8.4.2.1 Vacuum protection of cargo tanks (A, V) footnote, (2)
GC 8.4.2(a)
P IGC 9.5.2 Inert gas pressure monitoring (A, V) footnote
GC 9.5.2
         
  IGS      
S 3.15.3.2.1 Effluent drain valve position indicator I footnote
S 6.2 Tank pressure sensors MI footnote If required
         
  VEC systems      
P 2.5.2.3 Tank overflow alarm A, V footnote (2)
P 2.5.2.4 Signal for sequential shutdown of onshore pumps or valves or both and of the ships' valves (A, V) footnote (2)
P 2.5.2.5 Overflow alarm and shutdown signal (A, V) At an attended location
footnote (2)
P 2.5.2.6 Loss of power to the alarm system (A, V) footnote (2)
P 2.5.2.6 Tank level sensor electrical circuitry failure (A, V) footnote (2)
P 2.6.4 Main vapour collection line pressure MI footnote (2) VEC is equipped, common to two or more tanks
P 2.6.4.1 High vapour pressure alarm (A, V) footnote (2) VEC is equipped, common to two or more tanks
P 2.6.4.2 Low vapour pressure alarm (A, V) footnote (2) VEC is equipped, common to two or more tanks

Table 9.1.8 Location: not indicated by IMO instruments

Priority IMO Instrument Function Type Notes
  SOLAS II-1      
S 8.7.3 (now II-1/5) Draught indicator MI Passenger ships only (if required). For details see regulation 8.7.3 (now II-1/5)
         
  Gas or chemical codes      
P IBC 7.1.5 Monitoring of cargo temperature A, V, MI Alarm system only required if overheating or overcooling could result in a dangerous condition
BCH 2.15.5(a)
P IBC 13.1.1 Cargo tank levels MI  
BCH 3.9
P IBC 15.7.7 High temperature of phosphorus A, V  
BCH 4.5.7
         
  1989 MODU Code      
S 4.9.15 Draught indicator MI footnote At an attended location
II-1/8.7.3 (now II-1/5)

Table 9.1.9 Location: central ballast control station of column-stabilised MODUs

Priority IMO Instrument Function Type Notes
  1989 MODU Code      
S 3.6.4.1 Watertight doors and hatch cover position indicator I, V  
S 3.6.4.2 Watertight doors and hatch cover position alarm A, V  
S 4.8.8.1 Flooding detector I  
P 4.8.8.3 Propulsion and pump-room bilge high water level alarm A, V  
S 4.9.10.2 Ballast pump status-indicating system I For details see also 4.9.12
S 4.9.10.4 Ballast valve position-indicating system I For details see also 4.9.17
S 4.9.10.5 Tank level indicating system I For details see also 4.9.14
S 4.9.10.6 Draught indicating system I For details see also 4.9.15
S 4.9.10.7 Heel and trim indicators I  
S 4.9.10.8 Main and emergency power available indication I  
S 4.9.10.9 Ballast system hydraulic/pneumatic pressure indicating system I  
S 4.9.14.1 Ballast tanks liquid level MI  
S 4.9.14.2 Other tanks liquid level MI  
S 4.9.17 Ballast valve position I footnote
Parent topic: Alarms and Indicators - Code on Alarms and Indicators, 1995 – Resolution A.830(19)
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