RADIOTELEPHONE CALLING AND ANSWERING PROCEDURES

1. The operator who wish to contact any station in the system must first listen long enough to the circuit before keying the transceiver.
2. Must transmit the name of the station being called 3 times then the name of the calling station for proper identification.
3. Of mobile cars when calling or being called by the base, must give their location at once.
4. Long messages should e broken into phases and each phrase repeated once before going to the next phase of the message to avoid too much repetition.
5. Must transmit message slowly, distinctly at the rate of 60 words per minute.
6. Acknowledge message properly, giving the time received, date and operator who received same always be certain that the message received is complete.
7. Hold the microphone about two (2) inches away from the lips, approximately at 45 degrees, press the button firmly, then speak slowly and clear in a normal voice.
8. Do not shout into the microphone even though there is a great amount to noise in the vicinity, for it will cause distortion.
9. Think and know what you want to say, press the button firmly hesitating an instant, then speak distinctly. Be brief and concise, be impersonal, do not mumble, do not talk too fast.
10. Do not interfere when someone is transmitting a message unless your message is emergency in nature.
11. Obey orders from the base regardless of his rank, for his authority emanates from the head of the office.

TYPES OF MESSAGES

*CODH, or DHCO – Company deadhead message refer to traffic
licenses, repairs, supplies etc.. exchanged by radio between ships and
offices of the same radio service. There are charges.
*DH, or PDH- These complimentary franked messages may require
payment of only the landline charge, the ship and coastal charges being
frank card.
*DH MEDICO – Deadhead medical messages are free (deadhead)
messages pertaining to medical or surgical advice for persons aboard a
ship and are normally addressed to marine Hospital in a city served by the
coastal station receiving them.
*DH or OPR – Operator deadhead messages are personal message of
radio officers and may be forwarded through the coast stations of the same
radio service subject to only landline charges.
*GOVT – Government radiograms by accredited officials on official
government business are charged full rates.
*MSG – Master’s messages ate from masters of vessels and pertain
to ship’s business. Only coastal and landline charges are collected.
*OBS – Observer messages are meteorological reports from ship at
sea to Weather bureau. There are no charges insofar as the ship operator
is concerned.

RADIOTELEGRAPH OPERATING SIGNALS

SIGNAL MEANING

AA = All after
AB = All before
ABD = Repeat the figure in the abbreviated form
ADS = Address
AR = End of transmission
AS = Waiting period
BK = Signal used to interrupt a transmission in progress
BN = All between …to …
BQ = A reply to an RQ
C = Yes
CFM = Confirm
CL = I am closing my station
COL = Collate
CP = General call to two or more specified stations
CQ = General call to all stations
CS = Call signs (used to request to call sign)
DB = I cannot give you a bearing; you are not in the calibrated
sector of this station.
DC = the minimum of your signal is suitable for the bearing.
DE = Used to separate the call sign of the station called from
the call sign of the calling station.
DF = Your bearing at … (time) .. was … degrees, in the doubtful
sector of this station, with a possible error of … degrees.
DG = Please advise me if you note an error of the bearing given
DI = Bearing doubtful in consequence of the bad quality of your signal
DJ = Bearing doubtful. Ask for another bearing later
DP = Possible error of bearing any amount to … degrees
DS = Adjust your transmitter, the minimum of your signal is too
broad
DT = I cannot furnish you with a bearing; the minimum of
your signal is too broad
DY = This station is not able to determine the sense of the
bearing. What is your approximate direction relative to this
station?
DZ = Your bearing is reciprocal
ER = Here …
ETA = Estimated time of arrival
ITP = The punctuation counts.
JM = Make a series of dashes if I may transmit. Make a series of dots
To stop my transmission
K = Invitation to transmit
MN = Minute
MSG = Prefix indicating a message to air from the master of the ship
Concerning its operation or navigation
N = No
NIL = I have nothing to send you
NW = Now
OK = We agree (or it is correct)
P = Prefix indicating a private radio telegram
PTR = Used by a coast station to request the position an next
port of call or a mobile station
PBL = Preamble (used after a question mark to request a repetition
R = Received
REF = Reference to …
RPT = Repeat
RQ = Indication of a request
SIG = Signature
SOS = Distress signal
SS = Indicator preceding the name of a ship station
SVC = Prefix indicating a service telegram
SYS = Refer to your service telegram
TFC = Traffic
TR = Used a prefix to indicate reply to PTR
TTT = Safety signals
TU = Thank you
TXT = Text
VA = End of work
W = Words
WA = Word after
WB = Word before
XXX = Urgency signal

USEFUL CODE WORDS

Ab -About
Abb -Abbreviate
Abbd-Abbreviated
Abbg-Abbreviating
Abbn-abbreviation
Abd-Aboard
Abs-Absent
Abv-Above
Ads-Address
Af-After
Agn-Again
Ak-Acknowledge
Alw-Always
Amt-Amount
Ao-At once
Ar-Answer
Ax-Ask
B-Be
Bc-Because
Bd-Board
Bf-Before
Bk-Break
Btn-Bulletin
C-See
Cd-Could
Cf-Chief
Cfm-Confirm
Chhg-Charge
Cld-Called
Clr-Clear
Cm-Come
Ctd-Connected
Cy-Copy
D-in the
Dd-Did
Deg-Degree
Dg-Doing
Dld-Delivered
Dols-Dollarsq
Ea-Each
Enh-Enough
Eqm-Equipment
Es-And
Eu-Europe
F-Of the
Fm-From
Fo-For
Fri-Friday
Fw-Follow
G-From the
Gd-Good
Gg-Going
Gn-Gone
Gv-Give
H-Has
Hr-Here
Hv-Have
Hb-Have been
Iw-It was
J-By which
Jr-Junior
K-Out of the
Kmn-Communication
Kp-Keep
Kppg-Cooperating
Lg-Long
Lic-License
Ltr-Letter
Lvg-Leaving
M-More
Md-Made
Mda-Monday
Mfg-Manufacturing
Mk-Make
Mng-Morning
Mo-Month
Mvg-Moving
N-Not
Ni-Night
Numb-Number
DZ=Your bearing is reciprocal
ER=Here..
ETA=Estimated time of arrival
ITP=The punctuation counts.
JM=Make a series of dashes if I may transmit.Make a series of dots to stop my
transmission
K=Invitation to transmit
MN=Minute
MSG=Prefix indicating a message to air from the master of a ship concerning its operation or navigation
N=No
NIL=I have nothing to send you
NW=Now
OK=We agree(or it is correct)
P=Prefix indicating a private radiotelegram
PTR=Used by a coast station to request the position an next port of call or a mobile station
PBL=Preamble(used after a question mark to request a repetition)
R=Received
REF=Reference to...
RPT=Repeat
RQ=Indication of a request
SIG=Signature
SOS=Distress signal
SS=Indicator preceding the name of the ship station
SVC=Prefix indicating a service telegram
SYS=Refer to your service telegram
TFC=Traffic
TR=Used a prefix to indicate reply to PTR
TTT=Safety signal
TU=Thank you
TXT=Text
VA=End of work
W=Words
WA=Word after
WB=Word before
XXX=Urgency signal

Q SIGNALS

SIGNALS MEANING


QRA -The name of my station is...
QRB -The approximate distance between our station is...miles
QRC -The accounts for charges of my station are settled by...
QRD -I am abound for...from...
QRE -ETA at...is...hours
QRF -I am returning to...
QRG -Your exact frequency varies
QRI -The tone of your transmission is (1)Good (2)Variable (3)Bad
QRK -Readability is (1)unreadable (2)readable now and then (3)readable with difficulty
QRL -I am busy,please do not interfere with
QRM -I am troubled by static
QRO -Increase power
QRP -Decrease power
QRQ -Send faster
QRR -I am ready for automatic operation;send at...wpm
QRS -Send more slowly
QRT -Stop sending
QRU -I have nothing for you
QRV -I am ready
QRW -Please inform...that I am calling him on...khz

INTERNATIONAL MORSE CODE

A= ._ (di- dah)
B= _ ... (dah - di-dit-dit)
C= _._. (dah-di-dah -dit)
D= _.. (dah-di-dit)
E= . (dit)
F= .._. (d--d-dah-dit)
G= _ _. (dah-dah-dit)
H= .... (di-di-di-dit)
I= .. (di-dit)
J= ._ _ _(di-dah-dah-dah)
K= _._. (dah-di-dah)
L= ._.. (di-dah-di-dit)
M= _ _ (dah-dah)
N= _. (dah-dit)
O= _ _ _ (dah-dah-dah)
P= ._ _ .(di-dah-dah-dit)
Q= _ __._(dah-dah-di-dah)
R= ._. (di-dah-dit)
S= ... (di-di-dit)
T= _ (dah)
U= .._ (di-di-dah)
V= ..._ (di-di-di-dah)
W= ._ _ (di-dah-dah)
X= _.._ (dah-di-di-dah)
Y= _._ _ (dah-di-dah-dah)
Z= _ _.. (dah-dah-di-dit)

SIGNS

Period= ._._._ (di-dah-di-dah-di-dah)
Comma= _ _.._ _ (dah-dah-di-di-dah-dah)
Question mark= .._ _.. (di-dah-di-di-dah-dah)
Apostrophe=. _ _ _ _ (di-dah-dah-dah-dah-dit)
Hyphen or dash= _..._ (dah-di-di-di-dah)
Fraction bar= _.._. (dah-di-di-dah-dit)
Brackets= _._ _._ (dah-di-dah-dah-di-dah)
Double hypen or equal sign= _.._ (dah-di-di-dah)
Understoodf= ..._. (di-di-di-dah-di)
Error= ........ (di-di-di-di-di-di-di-dit)
End of transmission= ._._. (di-dah-di-dah-dit)
Invitation to transmit= _._ (dah-di-dah)
Wait= ._... (di-dah-di-di-dit)
End of work= ..._._ (di-di-di-dah-di-dah)