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The following reports were received by the NAVTEX system.
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The NAVTEX system is used for the automatic broadcast of localized Maritime Safety Information (MSI) using Radio Telex (also known as Narrow Band Direct Printing, or NBDP).
NAVTEX (Navigational Telex) is an international automated medium frequency direct-printing service for delivery of navigational and meteorological warnings and forecasts, as well as urgent marine safety information to ships.
It was developed to provide a low-cost, simple, and automated means of receiving this information aboard ships at sea within approximately 370 km (200 nautical miles) off shore.
Major areas of NAVTEX coverage include the Mediterranean Sea, the North Sea, coastal areas around Japan and areas around the North American continent.
The NAVTEX system has been allocated three broadcast frequencies: 518 kHz - the main NAVTEX channel; 490 kHz - used for broadcasts in local languages (i.e: non-English); 4209.5 kHz - allocated for NAVTEX broadcasts in tropical areas - not widely used at the moment.
NAVTEX messages are printed by the NAVTEX receiver in the exactly defined transmission format.
Note: the ERROR RATE, an indication of the radio signal reception property can also be added to the NAVTEX message. Usually it is added as text in the line before ZCZC indicator, for example (ERROR RATE = 3 %). It is usually not added if the error rate is 0%. Error rate of 0% means that there has been no error in the received message, with the signal strength being good. Otherwise error rate = number of erroneous characters (displayed/printed as "*") / total number of characters received * 100.
NAVTEX message example:
| ZCZC JE92 Error Rate= 0% 170500 UTC MAY SWEDISH WEATHER SHIPPING WEATHER SUMMARY FROM HIGH IN GREENLAND RIDGE OF HIGH SOUTHEASTWARDS TO SWEDEN, WEAK AREA OF LOW OVER WEST EUROPE. GALE WARNINGS NIL FORECAST VALID 24 HOURS SKAGERAK; KATTEGAT; THE SOUND: AROUND EAST 3-7 M/S SOMEWHAT INCREASING; IN WESTERN PART OF SKAGERAK DURING DAY AROUND 10. MAINLY GOOD VIS, IN SKAGERAK AT TIMES SOME RAIN. WESTERN BALTIC: WIND EASTERLY 7-11. GOOD VIS. NNNN | Стартовый код. Индекс станции, типа сообщения и степень ошибки. 17 мая в 0500 UTC, Шведская морская метеослужба. Сводка погоды: Обл. высокого давления в Гренландии перемещается на Юго-восток в сторону Швеции, слабая обл. низкого давления находится над Западной Европой. Штормовых предупреждений нет. Прогноз на 24 часа в районах Скагерак, Каттегат и Саунд: восточный ветер 3-7м/сек, усиливающийся; в западной части Скагерака в течение дня до 10м/сек. Преимущественно хорошая видимость, в Скагераке временно дождь. Западная часть Балтийского моря: восточный ветер 7-11 узл. Хорошая видимость. Заключительный код |
Exercise 1. Read and translate the texts of NAVTEX messages without assistance.
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Test 1.
ZCZC OA20 (ERROR RATE = 1 %)
WZ 1593
SCOTLAND, WEST COAST. SUMMER ISLES. THE NORTH CARDINAL LIGHTBUOY AND THE WEST CARDINAL LIGHT*UOY WITH RACON DELTA MARKING DANGEROUS WRECK
58-01.2 NORTH 005-27.1 WEST HAVE BEEN PERMANENTLY WITHDRAWN
CANCEL WZ 1562(OA07).
NNNN
Note: The above NAVTEX message example was sent by Port Patrick CRS (OA20) as navigational warning (OA20) with message number 20 (OA20). The message has an error rate of 1%, that is, the word LIGHTBUOY in the message "*" was printed instead of the letter B.
Test 2. Below are listed NAVTEX message examples of different message types (B2 Subject indicator).
ZCZC FA60
241046 UTC MAY 07
ANTALYA TURK RADIO
NAVTEX NW NR:298/07
EASTERN MEDITERRANEAN YACHT RALLY,
FROM 24 MAY 07 TO 19 JUN 07,
RALLY ROUTES MERSIN, ISKENDERUN,
LATTAKIA, JOUNEH, HAIFA, ASHKELON,
PORT SAID AND HERZLIYA, ALL VESSELS IN
THE REGION REQUESTED TO FOLLOW
THE NOTICE DECLARED BY AUTHORITES
WIDE BERTH ADVISED
NNNN
Test 3. Navigational warning example (B2 is A)
ZCZC SB76
271900 NAVTEX-HAMBURG (NCC)
WARNING NO. 145 271815UTC JUN
FOR GERMAN BIGHT:
ISSUED AT 27.06.2007 18.15 UTC
NEAR-GALES WEST 6-7 BFT.
NNNN
Test 4. Ice report example (B2 is C)
ZCZC LD00
020710 UTC JUN 07
LIMNOS RADIO SARWARN 0007/07
SEMI SUNK BOAT WITH
THREE (3) MEN OVERBOARD
IN PSN 39-07,7N 026-39,2E
SHIPS IN VICINITY ARE REQUESTED TO
PROCEED FOR SEARCH OPERATIONS
INFORMING JRCC PIRAEUS
NNNN
Test 5. SAR information example (B2 is D)
ZCZC EL50
NITON NAVTEX ST. 171455Z JUN 07
FOST SUBFACTS AND GUNFACTS WARNING
(ALL TIMES UTC).
1. DIVED SUBMARINE OPERATIONS IN
PROGRESS: NIL
2. LIVE GUNNERY FIRINGS IN PROGRESS:
PORTLAND APPROACHES - START POINT
TO SAINT ALBANS HEAD.
BETWEEN 180830 AND 181202 JUN.
FULL DETAILS IN HM COASTGUARD RESCUE
CENTRES VHF AND MF BROADCASTS OR
CONTACT NAVAL OPERATIONS PHONE
(44)(0)1752557550.
CANCEL EL49
NNNN
Test 6. Read and translate the special marine warnings without assistance.
1655 LT 11/01/2012 WX 38
METEOROLOGICAL SERVICE SINGAPORE=NEA*
=TTT=WARNING VALID 24 HOURS FROM 110600=WINDS NE 20/25 KNTS OBSERVED/FORECAST OVER CONDOR =NORTH OF LATITUDE 05N AND BETWEEN LONGITUDES 105E AND 110=SEA MODERATE TO ROUGH AND SWELL MODERATE FROM NE.
*NEA – National Environmental Agency
Test 7.
1715 UTC TUE OCT 11 2011
NWS* NATIONAL HURRICANE CENTER MIAMI FL
=COASTAL WATERS FORECAST FOR SOUTHWEST ALASKA BRISTOL BAY THE ALASKA PENINSULA WATERS AND THE ALEUTIAN ISLANDS UP TO 100 NM OUT =
=TODAY S WIND 35 KTS=SEAS 7 FT BUILDING TO 11 FT IN THE AFTERNOON=SNOW AND RAIN=
=TONIGHT S WIND 40 KTS BECOMING SE 60 KTS AFTER MIDNIGHT=SEAS 18 FT=RAIN AND SNOW=
=THU SE WIND 65 KTS=SEAS 30 FT=RAIN AND SNOW=
=THU NIGHT S WIND 45 KTS=SEAS 30 FT=
=FRI S WIND 40 KT. SEAS 31 FT=
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*NWS – National Weather Service
Test 8.
MARINE METEOROLOGICAL BULLETIN FOR MET AREA IX=
VALID FOR 24 HOURS COMMENCING 0700 UTC DATED 11/10/2011
BY PAKISTAN METEOROLOGICAL DEPARTMENT
PART -I: NIL
PART - II: NO ALERT MESSAGE
PART -III: FORECASTS
SUB AREA NO.1 NORTH ARABIAN SEA
I. WIND SW/NW’LY 10-15 KTS EAST OF 65ºE AND S/SW’LY 10-15KTS WEST OF 65º E=
II. WEATHER FAIR=PARTLY CLOUDY WITH HAZY MORNING=
III. VISIBILITY GOOD MAY BE MODERATE IN HAZE=
IV. STATE OF SEA SLIGHT=
SUB AREA NO. 2 GULF OF OMAN
I. WIND S/SE’LY 10-15KTS NORTH OF 24ºN AND S/SW’LY 10-15KTS SOUTH OF 24ºN=
II. WEATHER FAIR/PARTLY CLOUDY WITH CHANCES OF LIGHT RAIN=
III. VISIBILITY GOOD MAY BE MODERATE IN RAIN=
IV. STATE OF SEA SLIGHT=
Test 9.
HIGH SEAS WEATHER WARNING FOR METAREA 10
ISSUED BY THE AUSTRALIAN BUREAU OF METEOROLOGY, PERTH
AT 1518UTC 11 OCTOBER 2011=GALE WARNING FOR THE WESTERN AREA=PLEASE BE AWARE, WIND GUSTS CAN BE A FURTHER 40 PERCENT STRONGER THAN THE AVERAGES GIVEN HERE, AND MAXIMUM WAVES MAY BE UP TO TWICE THE HEIGHT=
=SITUATION AT 1500UTC=VIGOROUS W'LY FLOW DEVELOPING IN SOUTHERN OCEAN AFTER 120600UTC=
=AREA AFFECTED SW OF A LINE 42S080E 42S088E 50S092E AFTER 120600UTC MOVING TO SOUTH OF A LINE 42S080E 39S090E 41S102E 50S105E BY 121200UTC=
=W/NW WINDS 25/35 KNOTS, REACHING 35/45 KNOTS SOUTH OF LATITUDE 45S AFTER 120900UTC=VERY ROUGH TO HIGH SEAS=HEAVY SWELL=
Test 10.
0835 12/01
WARNING VALID 121200=WARNING IS UPDATED EVERY 6 HOURS=GALE WARNING=TROPICAL STORM BANYAN 1002 HPA AT 09.1N 127.6E SEA=EAST OF MINDANAO MOVING WESTNORTHWEST 09 KN=
=POSITION POOR=MAX WINDS 35 KN NEAR CENTER=RADIUS OF OVER 30 KN WINDS 180 MILES=FORECAST POSITION FOR 121200UTC AT 11.3N 124.5E WITH 70 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE=992 HPA, MAX WINDS 45 KN NEAR CENTER=
=EXTENDED OUTLOOK=FORECAST POSITION FOR 131200UTC AT 13.4N 121.4E WITH 110 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE=
990 HPA, MAX WINDS 45 KN NEAR CENTER=
=FORECAST POSITION FOR 141200UTC AT 16.2N 118.9E WITH 160 MILES RADIUS OF 70 PERCENT PROBABILITY CIRCLE=990 HPA, MAX WINDS 45 KN NEAR CENTER=JAPAN METEOROLOGICAL AGENCY=
ПРИЛОЖЕНИЕ А
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