International maritime signal flags
from INTERNATIONAL CODE OF SIGNALS
GENERAL SIGNAL CODE
Editorial Note: In the "GENERAL SIGNAL CODE (Revised 2020)," multiple codes are listed under "Cross Reference," but these have been omitted here.
Editorial Note: Additionally, there are other omitted data not mentioned above. For details, please refer to the [INTERNATIONAL CODE OF SIGNALS ].
Editorial Note: Additionally, there are other omitted data not mentioned above. For details, please refer to the [INTERNATIONAL CODE OF SIGNALS ].
SECTION 1: DISTRESS—EMERGENCY
ABANDON
* AA
Repeat all after…
* Procedural signals for repetition.
* AB
Repeat all before…
* Procedural signals for repetition.
AC
I am abandoning my vessel.
AD
I am abandoning my vessel which has suffered a nuclear accident and is a possible source of radiation danger.
AE
I must abandon my vessel.
AE 1
I (or crew of vessel indicated) wish to abandon my (or their) vessel, but have not the means.
AE 2
I shall abandon my vessel unless you will remain by me, ready to assist.
AF
I do not intend to abandon my vessel.
AF 1
Do you intend to abandon your vessel?
AG
You should abandon your vessel as quickly as possible.
AH
You should not abandon your vessel.
AI
Vessel (indicated by position and/or name or identity signal if necessary) will have to be abandoned.
ACCIDENT—DOCTOR—INJURED/SICK
Accident
AJ
I have had a serious nuclear accident and you should approach with caution.
AK
I have had a nuclear accident on board.
Doctor
AL
I have a doctor on board.
AM
Have you a doctor?
AN
I need a doctor.
AN 1
I need a doctor; I have severe burns.
AN 2
I need a doctor; I have radiation casualties.
Injured/Sick
AO
Number of injured and/or dead not yet known.
AO 1
How many injured?
AO 2
How many dead?
AP
I have… (number) casualties.
AQ
I have injured/sick person (or number of persons indicated) to be taken off urgently.
AT
You should send injured/sick persons to me.
AIRCRAFT-HELICOPTER
Alight-Landing
Doctor
AU
I am forced to alight near you (or in position indicated).
AV
I am alighting (in position indicated if necessary) to pick up crew of vessel/aircraft.
AW
Aircraft should endeavor to alight where flag is waved or light is shown.
AX
You should train your searchlight nearly vertical on a cloud, intermittently if possible, and, if my aircraft is seen, deflect the beam upwind and on the water to facilitate my landing.
AX 1
Shall I train my searchlight nearly vertical on a cloud, intermittently if possible, and, if your aircraft is seen, deflect the beam upwind and on the water to facilitate your landing?
AY
I will alight on your deck; (you should steer course… speed… knots).
AZ
I cannot alight but I can lift crew.
AZ 1
I cannot alight but I can lift injured/sick person.
BA
You cannot alight on the deck.
BA 1
You cannot alight on the deck; can you lift crew?
BA 2
You cannot alight on the deck; can you lift injured/sick person?
BB
You may alight on my deck.
BB 1
You may alight on my deck; I am ready to receive you forward.
BB 2
You may alight on my deck; I am ready to receive you amidship.
BB 3
You may alight on my deck; I am ready to receive you aft.
BB 4
You may alight on my deck but I am not yet ready to receive you.
Communications
BC
I have established communications with the aircraft in distress on 2182 kHz.
BC 1
Can you communicate with the aircraft?
BD
I have established communications with the aircraft in distress on… kHz.
BE
I have established communications with the aircraft in distress on… MHz.
Ditched-Disabled-Afloat
BF
Aircraft is ditched in position indicated and requires immediate assistance.
BG
Aircraft is still afloat.
Flying
BH
I sighted an aircraft at time indicated in lat… long… flying on course…
BH 1
Aircraft was flying at high altitude.
BH 2
Aircraft was flying at low altitude.
BI
I am flying to likely position of vessel in distress.
BI 1
I am flying at low altitude near the vessel.
BJ
I am circling over the area of accident.
BJ 1
An aircraft is circling over the area of accident.
BK
You are overhead.
BK 1
Am I overhead?
BL
I am having engine trouble but am continuing flight.
Parachute
BM
You should parachute object to windward. Mark it by smoke or light signal.
BM 1
I am going to parachute object to windward, marking it by smoke or light signal.
BM 2
I am going to parachute equipment.
BM 3
Inflatable raft will be dropped to windward by parachute.
* BN
Repeat all between… and…
* Procedural signal for repetition.
BO
We are going to jump by parachute.
Search—Assistance
BP
Aircraft is coming to participate in search. Expected to arrive over the area of accident at time indicated.
Speed
BQ
The speed of my aircraft in relation to the surface of the earth is… (knots or kilometers per hour).
BQ 1
What is the speed of your aircraft in relation to the surface of the earth?
Helicopter
BR
I require a helicopter urgently.
BR 1
I require a helicopter urgently to pick up persons.
BR 2
I require a helicopter urgently with a doctor.
BR 3
I require a helicopter urgently to pick up injured/sick person.
BR 4
I require a helicopter urgently with inflatable raft.
BS
You should send a helicopter/boat with stretcher.
BT
Helicopter is coming to you now (or at time indicated).
BT 1
Helicopter is coming to you now (or at time indicated) to pick up persons.
BT 2
Helicopter is coming to you now (or at time indicated) with a doctor.
BT 3
Helicopter is coming to you now (or at time indicated) to pick up injured/sick person.
BT 4
Helicopter is coming to you now (or at time indicated) with inflatable raft.
BU
A helicopter/boat is coming to take injured/sick.
BV
I cannot send a helicopter.
BW
The magnetic course for you to steer towards me (or vessel or position indicated) is… (at time indicated).
BX
The magnetic course for the helicopter to regain its base is…
BY
Will you indicate the magnetic course for me to steer towards you (or vessel or position indicated)?
BZ
Your magnetic bearing from me (or from vessel or position indicated) is… (at time indicated).
CA
What is my magnetic bearing from you (or from vessel or position indicated)?
ASSISTANCE
Required
CB
I require immediate assistance.
CB 1
I require immediate assistance; I have a dangerous list.
CB 2
I require immediate assistance; I have damaged steering gear.
CB 3
I require immediate assistance; I have a serious disturbance on board.
CB 4
I require immediate assistance; I am aground.
CB 5
I require immediate assistance; I am drifting.
CB 6
I require immediate assistance; I am on fire.
CB 7
I require immediate assistance; I have sprung a a leak.
CB 8
I require immediate assistance; propeller shaft is broken.
CC
I am (or vessel indicated is) in distress in lat… long… (or bearing… from place indicated, distance…) and require immediate assistance (Complements Table 2, Chapter 2, Section 10, Page 102 if required).
CD
I require assistance in the nature of… (Complements Table 2, Chapter 2, Section 10, Page 102).
CE
I will attempt to obtain for you the assistance required.
CF
Signals from vessel/aircraft requesting assistance are coming from bearing…from me (lat… long… if necessary).
CG
Stand by to assist me (or vessel indicated).
CG 1
I will stand by to assist you (or vessel indicated).
CH
Vessel indicated is reported as requiring assistance in lat… long… (or bearing… from place indicated, distance…).
CH 1
Lightvessel (or lighthouse) indicated requires assistance.
CH 2
Space ship is down in lat… long… and requires immediate assistance.
CI
Vessel aground in lat… long… requires assistance.
CJ
Do you require assistance?
CJ 1
Do you require immediate assistance?
CJ 2
Do you require any further assistance?
CJ 3
What assistance do you require?
CJ 4
Can you proceed without assistance?
Not Required—Declined
CK
Assistance is not (or is no longer) required by me (or vessel indicated).
CL
I offered assistance but it was declined.
Given—Not Given
CM
One or more vessels are assisting the vessel in distress.
CM 1
Vessel/aircraft reported in distress is receiving assistance.
CN
You should give all possible assistance.
CN 1
You should give immediate assistance to pick up survivors.
CN 2
You should send survival craft to assist vessel indicated.
CO
Assistance cannot be given to you (or vessel/aircraft indicated).
CO 1
I cannot give the assistance required.
Proceeding to Assistance
CP
I am (or vessel indicated is) proceeding to your assistance.
CP 1
SAR aircraft is coming to your assistance.
*CQ
Call for unknown station(s) or general call to all stations.
* Procedural signals.
CR
I am proceeding to the assistance of vessel (in lat… long…).
*CS
What is the name or identity signal of your vessel (or station)?
Procedural signals.
CT
I (or vessel indicated) expect to reach you at time indicated.
CU
Assistance will come at time indicated.
CU 1
I can assist you.
CV
I am unable to give assistance.
CV 1
Will you go to the assistance of vessel indicated (in lat… long…)?
CV 2
May I assist you?
CV 3
Can you assist me (or vessel indicated)?
CV 4
Can you assist?
BOATS—RAFTS
CW
Boat/raft is on board.
CW 1
Boat/raft is safe.
CW 2
Boat/raft is in sight.
CW 3
Boat/raft is adrift.
CW 4
Boat/raft is aground.
CW 5
Boat/raft is alongside.
CW 6
Boat/raft is damaged.
CW 7
Boat/raft has sunk.
CW 8
Boat/raft has capsized.
CX
Boats cannot be used.
CX 1
Boats cannot be used because of prevailing weather conditions.
CX 2
Boats cannot be used on the starboard side because of list.
CX 3
Boats cannot be used on the port side because of list
CX 4
Boats cannot be used to disembark people.
CX 5
Boats cannot be used to get alongside.
CX 6
Boats cannot be used to reach you.
CX 7
I cannot send a boat.
CY
Boat(s) is(are) coming to you.
CY 1
Boat/raft is making for the shore.
CY 2
Boat/raft has reached the shore.
CZ
You should make a lee for the boat(s)/raft(s).
CZ 1
You should discharge oil to smooth sea.
DA
Boat(s)/raft(s) should approach vessel as near as possible to take off persons.
DB
Veer a boat or raft on a line.
DC
Boat should endeavor to land where flag is waved or light is shown.
DD
Boats are not allowed to come alongside.
DD 1
Boats are not allowed to land (after time indicated).
*DE
From…
* Procedural signal used to precede the name or identity signal of the calling station.
Available
DF
I have… (number) serviceable boats.
DG
I have a motor boat [or… (number) motor boats].
DH
I have no boat/raft.
DH 1
I have no motor boat.
DH 2
Have you any boats with radiotelegraph installation or portable radio equipment?
DH 3
How many serviceable motor boats have you?
DH 4
How many serviceable boats have you?
Required
DI
I require boats for… (number) persons.
DJ
Do you require a boat?
Send
DK
You should send all available boats/rafts.
DK 1
You should send back my boat.
DK 2
Can you send a boat?
DL
I can send a boat.
DL 1
I am sending a boat.
Search
DM
You should search for the boat(s)/raft(s).
DN
I have found the boat/raft.
DN 1
Have you seen or heard anything of the boat/raft?
DO
Look out for boat/raft in bearing… distance… from me (or from position indicated).
DP
There is a boat/raft in bearing… distance… from me (or from position indicated).
DQ
An empty boat/raft has been sighted in lat… long… (or bearing… from place indicated, distance…).
DISABLED—DRIFTING—SINKING
Disabled
DR
Have you sighted disabled vessel/aircraft in approximate lat… long…?
DS
I sighted disabled aircraft in lat… long… at time indicated.
DT
I sighted disabled vessel in lat… long… at time indicated.
DT 1
I sighted disabled vessel in lat… long… at time indicated, apparently without a radio.
Drifting
DU
I am drifting at… (number) knots, towards… degrees.
DV
I am drifting.
DV 1
I am adrift.
DW
Vessel (name or identity signal) is drifting near lat… long….
Sinking
DX
I am sinking (lat… long… if necessary).
DY
Vessel (name or identity signal) has sunk in lat… long…
DY 1
Did you see vessel sink?
DY 2
Where did vessel sink?
DY 3
Is it confirmed that vessel (name or identity signal) has sunk?
DY 4
What is the depth of water where vessel sunk?
DISTRESS
Vessel/Aircraft in Distress
DZ
Vessel (or aircraft) indicated appears to be in distress.
DZ 1
Is vessel (or aircraft) indicated in distress?
DZ 2
What is the name (or identity signal) of vessel in distress?
EA
Have you sighted or heard of a vessel in distress? (Approximate position lat… long… or bearing… from place indicated, distance…).
EA 1
Have you any news of vessel/aircraft reported missing or in distress in this area?
EB
There is a vessel (or aircraft) in distress in lat… long… (or bearing… distance… from me, or Complements Table 3, Chapter 2, Section 10, Page 102).
EC
A vessel which has suffered a nuclear accident is in distress in lat… long…
Distress Signal
*ED
Your distress signals are understood.
* Reference is made to signals prescribed by the International Convention for the Safety of Life at Sea, 1974 (Regulation 16(a), Chapter V) as replies from lifesaving stations or maritime rescue units to distress signals made by a ship or person.
ED 1
Your distress signals are understood; the nearest life-saving station is being informed.
EF
SOS/MAYDAY has been cancelled.
EF 1
Has the SOS/MAYDAY been cancelled?
EG
Did you hear SOS/MAYDAY given at time indicated?
EG 1
Will you listen on 2182 kHz for signals of emergency position-indicating radiobeacons?
EG 2
I am listening on 2182 kHz for signals of emergency position-indicating radiobeacons.
EG 3
Have you received the signal of an emergency position-indicating radiobeacon on 2182 kHz?
EG 4
I have received the signal of an emergency position-indicating radiobeacon on 2182 kHz.
EG 5
Will you listen on… MHz for signals of emergency position-indicating radiobeacons?
EG 6
I am listening on… MHz for signals of emergency position-indicating radiobeacons.
EG 7
Have you received the signal of an emergency position-indicating radiobeacon on… MHz?
EG 8
I have received the signal of an emergency position-indicating radiobeacon on… MHz.
EJ
I have received distress signal transmitted by coast station indicated.
EJ 1
Have you received distress signal transmitted by coast station indicated?
EK
I have sighted distress signal in lat… long…
EK 1
An explosion was seen or heard (position or direction and time to be indicated).
EK 2
Have you heard or seen distress signal from survival craft?
Position of Distress
EL
Repeat the distress position.
EL 1
What is the position of vessel in distress?
EM
Are there other vessels/aircraft in the vicinity of vessel/aircraft in distress?
Contact or Locate
EN
You should try to contact vessel/aircraft in distress.
EO
I am unable to locate vessel/aircraft in distress because of poor visibility.
EP
I have lost sight of you.
EQ
I expect to be at the position of vessel/aircraft in distress at time indicated.
EQ 1
Indicate estimated time of your arrival at position of vessel/aircraft in distress.
POSITION
ER
You should indicate your position at time indicated.
ET
My position at time indicated was lat… long…
EU
My present position is lat… long… (or bearing… from place indicated, distance…).
EU 1
What is your present position?
EV
My present position, course, and speed are lat… long… ,… , knots…
EV 1
What are your present position, course, and speed?
EW
My position is ascertained by dead reckoning.
EW 1
My position is ascertained by visual bearings.
EW 2
My position is ascertained by astronomical observations.
EW 3
My position is ascertained by radiobeacons.
EW 4
My position is ascertained by radar.
EW 5
My position is ascertained by electronic position-fixing system.
EX
My position is doubtful.
EY
I am confident as to my position.
EY 1
Are you confident as to your position?
EZ
Your position according to bearings taken by radio direction finder stations which I control is lat… long… (at time indicated).
EZ 1
Will you give me my position according to bearings taken by radio direction finder stations which you control?
FA
Will you give me my position?
FB
Will vessels in my immediate vicinity (or in the vicinity of lat… long…) please indicate position, course, and speed.
Position of Distress
FC
You should indicate your position by visual or sound signals.
FC 1
You should indicate your position by rockets or flares.
FC 2
You should indicate your position by visual signals.
FC 3
You should indicate your position by sound signals.
FC 4
You should indicate your position by searchlight.
FC 5
You should indicate your position by smoke signal.
FD
My position is indicated by visual or sound signals.
FD 1
My position is indicated by rockets or flares.
FD 2
My position is indicated by visual signals.
FD 3
My position is indicated by sound signals.
FD 4
My position is indicated by searchlight.
FD 5
My position is indicated by smoke signal.
SEARCH AND RESCUE
Proceeding to Assistance
FE
I am proceeding to the position of accident at full speed. Expect to arrive at time indicated.
FE 1
Are you proceeding to the position of accident? If so, when do you expect to arrive?
Position of Distress or Accident
FF
I have intercepted SOS/MAYDAY from vessel (name or identity signal) (or aircraft) in position lat… long… at time indicated.
FF 1
I have intercepted SOS/MAYDAY from vessel (name or identity signal) (or aircraft) in position lat… long… at time indicated; I have heard nothing since.
FG
Position given with SOS/MAYDAY from vessel (or aircraft) was lat… long… (or bearing… from place indicated, distance…).
FG 1
What was position given with SOS/MAYDAY from vessel (or aircraft)?
FH
Position given with SOS/MAYDAY is wrong. The correct position is lat… long…
FI
Position given with SOS/MAYDAY by vessel is wrong. I have her bearing by radio direction finder and can exchange bearings with any other vessel.
FJ
Position of accident (or survival craft) is marked.
FJ 1
Position of accident (or survival craft) is marked by flame or smoke float.
FJ 2
Position of accident (or survival craft) is marked by sea marker.
FJ 3
Position of accident (or survival craft) is marked by sea marker dye.
FJ 4
Position of accident (or survival craft) is marked by radiobeacon.
FJ 5
Position of accident (or survival craft) is marked by wreckage.
FK
Is position of accident (or survival craft) marked?
Information—Instructions
FL
You should steer course… (or follow me) to reach position of accident.
FM
Visual contact with vessel is not continuous.
FN
I have lost all contact with vessel.
FO
I will keep close to you.
FO 1
I will keep close to you during the night.
FP
Estimated set and drift of survival craft is… degrees and… knots.
FP 1
What is the estimated set and drift of survival craft?
FQ
You should transmit your identification and series of long dashes or your carrier frequency to home vessel (or aircraft) to your position.
FQ 1
Shall I home vessel (or aircraft) to my position?
Search
FR
I am (or vessel indicated is) in charge of coordinating search.
*FR 1
Carry out search pattern… starting at… hours. Initial course… search speed… knots.
*FR 2
Carry out radar search, ships proceeding in loose line abreast at intervals between ships…miles. Initial course… search speed… knots.
*FR 3
Vessel indicated (call sign or identity signal) is allocated track number…
*FR 4
Vessel(s) indicated adjust interval between ships to… miles.
*FR 5
Adjust track spacing to… miles.
*FR 6
Search speed will now be… knots.
*FR 7
Alter course as necessary to next leg of track now (or at time indicated).
FS
Please take charge of search in sector stretching between bearings… and… from vessel in distress.
FT
Please take charge of search in sector between lat… and… , and long… and…
FU
The search area of the aircraft is between lat… and… , and long… and…
FV
Search by aircraft/helicopter will be discontinued because of unfavorable conditions.
FW
You should search in the vicinity of lat… long…
FX
Shall I search in the vicinity of lat… long…?
FY
I am in the search area.
FY 1
Are you in the search area?
FZ
You should continue search according to instructions and until further notice.
FZ 1
I am continuing to search.
FZ 2
Are you continuing to search?
FZ 3
Do you want me to continue to search?
GA
I cannot continue to search.
GB
You should stop search and return to base or continue your voyage.
* These signals are intended for use in connection with the International Aeronautical and Maritime Search and Rescue Manual (IAMSAR Manual) Volume III.
R
Results of Search
GC
Report results of search.
GC 1
Results of search negative. I am continuing to search.
GC 2
I have searched area of accident but have found no trace of derelict or survivors.
GC 3
I have noted patches of oil at likely position of accident.
GD
VVessel/aircraft missing or being looked for has not been heard of since.
GD 1
Have you anything to report on vessels/aircraft missing or being looked for?
GD 2
Have you seen wreckage (or derelict)?
GE
Vessel/aircraft has been located at lat… long…
GF
I have found vessel/aircraft in distress in lat… long…
GG
Vessel/aircraft was last reported at time indicated in lat… long… steering course…
GH
I have sighted survival craft in lat… long… (or bearing… distance… from me).
GI
Survival craft are believed to be in the vicinity of lat… long…
GJ
Wreckage is reported in lat… long…
GJ 1
Wreckage is reported in lat… long… No survivors appear to be in the vicinity.
GK
Aircraft wreckage is found in lat… long…
GL
I have located (or found) wreckage from the vessel/aircraft in distress (position to be indicated if necessary by lat… and long… or by bearing… from specified place and distance…).
Rescue
GM
I cannot save my vessel.
GM 1
I cannot save my vessel; keep as close as possible.
GN
You should take off persons.
GN 1
I wish some persons taken off. Skeleton crew will remain on board.
GN 2
I will take off persons.
GN 3
Can you take off persons?
GO
I cannot take off persons.
GP
You should proceed to the rescue of vessel (or ditched aircraft) in lat… long…
GQ
I cannot proceed to the rescue owing to weather. You should do all you can.
GR
Vessel coming to your rescue (or to the rescue of vessel or aircraft indicated) is steering course… , speed… knots.
GR 1
You should indicate course and speed of vessel coming to my rescue (or to the rescue of vessel or aircraft indicated).
GS
I will attempt rescue with whip and breeches buoy.
*GT
I will endeavor to connect with line throwing apparatus.
* Reference is made to signals prescribed by the International Convention for the Safety of Life at Sea, 1974 (Regulation 16(c) Chapter V) in connection with the use of shore lifesaving apparatus.
GT 1
Look out for rocket line.
GU
It is not safe to fire a rocket.
GV
You should endeavor to send me a line.
GV 1
Have you a line throwing apparatus?
GV 2
Can you connect with line throwing apparatus?
GV 3
I have not a line throwing apparatus.
GW
Man overboard. Please take action to pick him up (position to be indicated if necessary).
Results of Rescue
GX
Report results of rescue.
GX 1
What have you (or rescue vessel/aircraft) picked up?
GY
I (or rescue vessel/aircraft) have picked up wreckage.
GZ
All persons saved.
GZ 1
All persons lost.
HA
I (or rescue vessel/aircraft) have rescued… (number) injured persons.
HB
I (or rescue vessel/aircraft) have rescued… (number) survivors.
HC
I (or rescue vessel/aircraft) have picked up… (number) bodies.
HD
Can I transfer rescued persons to you?
SURVIVORS
HF
I have located survivors in water, lat…long…(or bearing…from place indicated, distance…).
HG
I have located survivors in survival craft lat… long… (or bearing… from place indicated, distance…).
HJ
I have located survivors on drifting ice, lat… long…
HK
I have located bodies in lat… long… (or bearing… from place indicated, distance…).
HL
Survivors not yet located.
HL 1
I am still looking for survivors.
HL 2
Have you located survivors? If so, in what position?
HM
Survivors are in bad condition. Medical assistance is urgently required.
HM 1
Survivors are in bad condition.
HM 2
Survivors are in good condition.
HM 3
Condition of survivors not ascertained.
HM 4
What is condition of survivors?
HN
You should proceed to lat… long… to pick up survivors.
HO
Pick up survivors from drifting ice, lat… long…
HO 1
Pick up survivors from sinking vessel/aircraft.
HP
Survivors have not yet been picked up.
HP 1
Have survivors been picked up?
HQ
Transfer survivors to my vessel (or vessel indicated).
HQ 1
Have you any survivors on board?
HR
You should try to obtain from survivors all possible information.
HT
You should indicate position of survivors by throwing pyrotechnic signals.
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