Navwarns

In addition to Notices to Mariners, the Hellenic Navy Hydrographic Service (HNHS), also issues urgent information entitled ‘’HELLENIC NAVWARNS’’, which concern information about the safety of navigation.

For Navwarns main theme, please see paragraph 7.1 of Annual Notice Νο.13.

Navwarns do not replace the notice issued by HNHS or other navigational aids.

Navwarns are numbered throughout each year, by a serial number starting from 1, this number to be followed by the year of issuance (i.e. 1073/1999).

Navwarns are eliminated:

  1. Automatically (when they have a specified duration)
  2. By another Navwarn
  3. By a relative Notice to Mariner (in which the initial information of the Navwarn is included more fully and extensively), so the Navwarn continues to be transmitted for 15 days from the issuance of the Notice that repeals it, because it is estimated that within this time frame the diffusion of the Notice will have been concluded.

Navwarns are not printed and are not distributed as Notices to Mariners  do, but, due to the emergency of situation, are been transmitted via Radiotelephony as follows:

  1. J3E type of transmission in Greek and English language by the following shore stations in areas as follows:

‘‘KERKYRA RADIO’’ (39o 36’ 25,7’’ – 19o 53’ 28,4’’) from the Ionian Sea until the meridian 22o 30’ 00’’ towards east (Patraikos and Corinthiakos bays included)

‘‘IRAKLEIO RADIO’’ (35o 19’ 19,7’’ – 25o 44’ 54,9’’) and ‘‘LIMNOS RADIO’’ (39o 54’ 24,7’’ – 25o 10’ 50,6’’) for the Aegean Sea between parallels: 34o 00’ 00’’ – 41o 00’ 00’’ and meridians 22o 30’ 00’’ – 30o 00’ 00’’.
‘‘RODOS RADIO’’ (36o 24’ 31,2’’ – 2813’ 37,1’’) for the South Aegean Sea between parallels: 3400’ 00’’ – 38o 00’ 00’’ and meridians 22o 30’ 00’’ – 3000’ 00’’.

The shore stations KERKYRA RADIO and LIMNOS RADIO are also transmitting the summary table of Hellenic Navwarns which are valid for the Greek seas.

Note: The call sign, the frequency, the time and type of emission and other attributes of the above stations, as well as information concerning the broadcasting of ‘‘Weather Report” and “Press Release” are provided in detail in the table of frequencies which is attached at the end of the document. 

  2.   G2B / G3E type of transmission in Greek and English language for the Greek seas, by the following VHF transmitters of “OLYMPIA RADIO” Emitting Station

 Router Position  Transmission
channel 
Power
(WATT) 
Navwarns
Transmission
hours UTC 
Navwarns
Transmission
hours UTC 
 KERKYRA 39 44 54 - 019 52 20 02 50    For the area

of the Eastern

Mediterranean

and the

Black Sea

06:00

10:00

16:00

22:00
 KEFALLINIA 38 08 28 - 020 39 31  27 50
 PATRA 38 14 47 - 021 46 07 85 50  NO
 PETALIDI 36 55 45 - 021 51 32 83 50   
 KYTHIRA 36 15 57 - 023 02 50 85 50
 MOUSTAKO, CRETE 35 18 28 - 023 36 35 04 50  NO
 KNOSSOS, CRETE 35 16 52 - 024 56 08 83 50 05:00
11:00 
17:30 
 SITEIA, CRETE 35 04 14 - 026 11 32 85 50
 RODOS 36 16 22 - 027 56 01 63 50
SYROS 37 27 27 - 024 55 37 04 25    23:30
PARNITHA 38 10 16 - 023 43 39 25 50
PILION 39 24 16 - 023 03 07 60 50
CHIOS 38 22 34 - 026 02 44 85 50 NO
MYTILINI 39 04 22 - 026 21 15 01 50    
LIMNOS 39 54 14 - 025 04 39 82 50
SFEDAMI, PIERIA 40 25 09 - 022 31 06 23 50
ASTYPALAIA 36 35 59-026 26 26 23 50  NO
THASOS 40 43 51 - 024 39 43 85 50   
FAISTOS 34 59 37  - 025 12 25 27 50



Note:

a. The aforementioned emissions are pre-announced in the international distress channel 16 for VHF and with a DSC (SAFETY) call frequency 2187,5 for MF.

b. If Navwarns are issued that require immediate transmission, they are transmitted from the working channels of the areas concerned, firstly by digital selection call (DSC) in channel 70, followed by a Navwarn in the international distress channel 16 for VHF and with a DSC (SAFETY) call in frequency 2187,5 for MF.
The above paragraph’ s stations transmit daily, at the above hours, in Greek and English language, the number Navwarns for Mariners (HELLENIC NAVWARNS) as well as the “table of valid Navwarns”. Which is issued daily by HNHS. Also, the above stations received and retransmit ship information relative to the Safety of Navigation.
The full text of a Navwarn that is not transmitted, a summary of which is included in the “table of valid Navwarns”, can be requested from the aforementioned stations by any interested Mariner.
The local port authorities provide, during permission grant for sailing (CLEARANCE), the last “table of valid Navwarns”, where every number of valid Navwarn is indicated, its subject and the area which is referred to (in summary), so as the Captain right after sailing to be ask via R/T the shore stations for the full text of the Navwarn that is interesting for his voyage.

On the occasion where HNHS considers necessary the wider dissemination of a Navwarn, they forward it as NAVHELLEN to coordinator NAVAREA III(SPAIN), which has been appointed as the responsible for Navwarns dissemination for the entire Mediterranean – Black Sea area.

Detailed information about areas and their coordinators, stations, frequencies and emission hours of NAVAREA Navwarns, are provided in Notice #13 of each year, as well as in the ADMIRALTY LIST OF RADIO SIGNALS NP 283(1) of the British Admiralty.

For valid Navwarns, please press here.