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NAV 46/WP.3
ANNEX
Page 56
Appendix to AI - External Communication Phrases
Standard GMDSS Messages
For further details see: ITU MANUAL for use by the Maritime Mobile and Maritime
Mobile-Satellite Services, Geneva.
1
Standard Distress Message
.1
Structure
Upon receipt of a DSC Distress Alert acknowledgement the vessel in distress should
commence the distress traffic on one of the international distress traffic frequencies for
telephony (VHF Channel 16 or 2182 kHz) as follows:
MAYDAY
THIS IS
- the 9-digit Maritime Mobile Service Identity code (MMSI) plus name / call sign
or other identification of the vessel calling
- the position of the vessel
- the nature of distress
- the assistance required
- any other information which might facilitate rescue.
.2
Example
MAYDAY
- THIS IS TWO-ONE-ONE-TWO-THREE-NINE-SIX-EIGHT-ZERO
MOTOR VESSEL "BIRTE" CALL SIGN DELTA ALPHA MIKE KILO
- POSITION SIX TWO DEGREES ONE ONE DECIMAL EIGHT
MINUTES NORTH
- ZERO ZERO SEVEN DEGREES FOUR FOUR MINUTES EAST
- I AM ON FIRE AFTER EXPLOSION
- I REQUIRE FIRE FIGHTING ASSISTANCE
- SMOKE NOT TOXIC
OVER
2 Standard Urgency Message
.1
Structure
After the transmission of a DSC Urgency Call switch the transmitter to VHF Channel 16 or
frequency 2182 kHz (if not automatically controlled) and commence the urgency traffic as
follows:
PAN-PAN (repeated three times)
ALL STATIONS (repeated three times)
THIS IS
- the 9-digit MMSI of the vessel plus name / call sign or other identification
- the position of the vessel
- the text of the urgency message.

NAV 46/WP.3
ANNEX
Page 57
.2
Example
PAN-PAN PAN-PAN PAN-PAN
ALL STATIONS ALL STATIONS ALL STATIONS
- THIS IS TWO-ONE-ONE-TWO-THREE-NINE-SIX-EIGHT-ZERO
MOTORVESSEL "BIRTE" CALL SIGN DELTA ALPHA MIKE KILO
- POSITION SIX TWO DEGREES ONE ONE DECIMAL EIGHT MINUTES NORTH
ZERO ZERO SEVEN DEGREES FOUR FOUR MINUTES EAST
- I HAVE PROBLEMS WITH ENGINES
- I REQUIRE TUG ASSISTANCE
OVER
3 Standard Safety Message
.1
Structure
After the transmission of a DSC Safety Call switch the transmitter to VHF Channel 16 or
frequency 2182 kHz (if not automatically controlled) and transmit the safety message as
follows:
SECURITE (repeated three times)
ALL STATIONS (or all ships in a specific geographical area, or to a specific station)
(repeated three times)
THIS IS
- the 9-digit MMSI of the vessel plus name / call sign or other identification
- the text of the safety message.
.3
Example
SECURITE SECURITE SECURITE
ALL SHIPS ALL SHIPS ALL SHIPS IN AREA PETER REEF
- THIS IS TWO-ONE-ONE-TWO-THREE-NINE-SIX-EIGHT-ZERO
MOTORVESSEL "BIRTE" CALL SIGN DELTA ALPHA MIKE KILO
- DANGEROUS WRECK LOCATED IN POSITION TWO NAUTICAL MILES
SOUTH OF PETER REEF OVER

NAV 46/WP.3
ANNEX
Page 58
AII
ON-BOARD COMMUNICATION PHRASES
(A)
AII/1 Standard Wheel Orders
All wheel orders given should be repeated by the helmsman and the officer of the watch
should ensure that they are carried out correctly and immediately. All wheel orders should be
held until countermanded. The helmsman should report immediately if the vessel does not
answer the wheel.
When there is concern that the helmsman is inattentive s/he should be questioned:
"What is your heading ?" And s/he should respond:
"My heading is ... degrees."
Order
Meaning
1. Midships
Rudder to be held in the fore and aft position.
2. Port / starboard five
5
°
of port / starboard rudder to be held.
3. Port / starboard ten
10
°
of port / starboard rudder to be held.
4. Port / starboard fifteen
15
°
of port / starboard rudder to be held.
5. Port / starboard twenty 20
°
of port / starboard rudder to be held.
6. Port / starboard twenty-five
25
°
of port / starboard rudder to be held.
7. Hard -a-port / starboard
Rudder to be held fully over to port / starboard.
8. Nothing to port/starboard
Avoid allowing the vessel’s head to go to
port/starboard
. 9.Meet her
Check the swing of the vessel´s head in a turn.
10. Steady
Reduce swing as rapidly as possible.
11. Ease to five / ten
Reduce amount of rudder to 5
°
/10
°
/15
°
/20
°
and hold.
/ fifteen / twenty
12. Steady as she goes
Steer a steady course on the compass heading indicated at
the time of the order. The helmsman is to repeat the
order and call out the compass heading on receiving
the order. When the vessel is steady on that heading,
the helmsman is to call out: "Steady on ..."
13. Keep the buoy/ mark/ beacon/ ... on port side / starboard side.
14. Report if she does not answer the wheel.
15. Finished with wheel, no more steering.
When the officer of the watch requires a course to be steered by compass, the direction in which s/he
wants the wheel turned should be stated followed by each numeral being said separately, including
zero, for example:
Order
Course to be steered
Port, steer one eight two
182
°
Starboard, steer zero eight two
082
°
Port, steer three zero five
305
°
On receipt of an order to steer, for example, 182
0
, the helmsman should repeat it and bring the vessel
round steadily to the course ordered. When the vessel is steady on the course ordered, the helmsman
is to call out:
"Steady on one eight two".
The person giving the order should acknowledge the helmsman's reply.
If it is desired to steer on a selected mark the helmsman should be ordered to:

NAV 46/WP.3
ANNEX
Page 59
"Steer on ... buoy / ... mark / ... beacon".
The person giving the order should acknowledge the helmsman's reply.
AII/2 Standard Engine Orders
Any engine order given should be repeated by the person operating the bridge telegraph(s) and the
officer of the watch should ensure the order is carried out correctly and immediately.
Order
1. (Port / starboard engines) Full ahead / astern
2. (Port / starboard engines) Half ahead / astern
3. (Port / starboard engines) Slow ahead / astern
4. (Port / starboard engines) Dead slow ahead / astern
5. Stop (port / starboard) engines
6. Emergency full ahead / astern
7. Stand by engine
(Engine-room personnel fully ready to manoeuvre and bridge manned to relay
engine orders.)
8. Finished with engines – no more manoeuvring.
(Operation of engines no longer required.)
In vessels fitted with twin propellers, the word "both" should be added to all orders affecting both
shafts, e.g. "Full ahead both", and "Slow astern both", except that the words "Stop all engines" should
be used, when appropriate. When required to manoeuvre twin propellers independently, this should
be indicated, i.e. "Full ahead starboard", "Half astern port", etc.
Where bow thrusters are used, the following orders are used:
9. Bow thruster full / half to port / starboard.
10. Stern thruster full / half to port / starboard.
11. Bow / stern thruster stop
AII/3
Pilot on the Bridge
AII/3.1
Propulsion system
. 1
Is the engine a diesel or a turbine?
. 1.1
The engine is a diesel / turbine.
. 2
Is the engine-room manned or is the engine on bridge control?
. 2.1
The engine-room is manned.
. 2.2
The engine is on bridge control.
. 3
How long does it take to change the engines from ahead to astern?
. 3.1
It takes ... seconds to change the engines (from ahead to astern).
. 4
How long does it take to start the engines from stopped?
. 4.1.
It takes ... seconds to start the engines (from stopped).
. 5
Is extra power available in an emergency?
. 5.1
Yes, extra power is available.
. 5.2
No, extra power is not available.
. 6
Do you have a controllable or fixed pitch propeller?
. 6.1
We have a controllable pitch propeller.
. 6.2
We have a fixed pitch propeller.
. 7
Do you have a right-hand or left - hand propeller?

NAV 46/WP.3
ANNEX
Page 60
. 7.1
We have a right-hand / left-hand propeller.
. 8
Do you have a single propeller or twin propellers?
. 8.1
We have a single propeller / twin propellers.
. 9
Do you have a bow thrusteror stern thruster?
. 9.1
We have one /two/.. bow thruster(s) / stern thruster(s).
.10
What is the maximum manoeuvring power ahead / astern?
.10.1
The maximum manoeuvring power ahead / astern is ... kiloWatts.
.11
What are the maximum revolutions ahead / astern?
.11.1
The maximum revolutions ahead / astern are ... .
.12
Do the twin propellers turn inward or outward when going ahead.
.12.1
The twin propellers turn inward / outward (when going ahead).
AII/3.2
Manoeuvring
. 1
I require the pilot card / manoeuvring data.
. 2
What is the diameter of the turning circle?
. 2.1
The diameter of the turning circle is ... metres.
. 3
What is the advance and transfer distance in a crash-stop?
. 3.1
The advance distance is ... kilometres / nautical miles,
the transfer distance is ... degrees (in a crash-stop).
. 4
How long does it take from hard-a-port to hard-a-starboard?
. 4.1
It takes ... seconds (from hard-a-port to hard-a-starboard).
. 5
Is the turning effect of the propeller very strong?
. 5.1
Yes, the turning effect (of the propeller) is very strong.
. 5.2
No, the turning effect (of the propeller) is not very strong.
. 6
Where is the whistle control?
. 6.1
The whistle control is on the console / on ... .
. 7
What notice is required to reduce from full sea speed to manoeuvring speed?
. 7.1
... minutes notice is required (to reduce from full sea speed
to manoeuvring speed).
. 8
Do you have an automatic pilot?
. 8.1
Yes, we have an automatic pilot.
. 8.2
No, we do not have an automatic pilot.
.9. Give ... short / prolonged blast(s) (on the whistle).
.1 .10 Stand by lookout.
.11 Maintain a speed of ... knots.
.12 What is the (manoeuvring) speed at full / half / slow / dead slow ahead?
.12.1 The manoeuvring speed at full / half / slow / dead slow ahead is ... knots.
.13 What is the full sea speed / fairway speed?
.13.1 The full sea speed / fairway speed is … knots.
AII/3.3
Radar
.1
Is the radar operational?
.1.1
Yes, the radar is operational.
.1.2
No, the radar is not operational.
.2
Where is the radar antenna?
.2.1
The radar antanna is on … .
.3
Does the radar have any blind sectors?
.3.1
Yes, the radar has blind sectors from … to … degrees and from … to … degrees.
.3.2
No, the radar does not have any blind sectors.
.4
Change the radar to
~ … miles range scale.