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:
- Automatically (when they have a specified duration)
- By another Navwarn
- 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’’ – 28o 13’ 37,1’’) for the South Aegean Sea between parallels: 34o 00’ 00’’ – 38o 00’ 00’’ and meridians 22o 30’ 00’’ – 30o 00’ 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 | |
| KEFALLINIA | 38 08 28 – 020 39 31 | 27 | 50 | For the area of the Eastern Mediterranean and the Black Sea | |
| PATRA | 38 14 47 – 21 46 07 | 85 | 12 | NO | For the area of the Eastern Mediterranean and the Black Sea |
| PETALIDI | 36 55 45 – 021 51 32 | 83 | 50 | For the area of the Eastern Mediterranean and the Black Sea | |
| KYTHIRA | 36 15 57 – 023 02 50 | 85 | 50 | For the area of the Eastern Mediterranean and the Black Sea | |
| MOUSTAKO, CRETE | 35 18 28 – 023 36 35 | 04 | 50 | NO | For the area of the Eastern Mediterranean and the Black Sea |
| KNOSSOS, CRETE | 35 16 52 – 024 56 08 | 83 | 50 | 05: 00 | 06:00 |
| SITEIA, CRETE | 35 04 14 – 026 11 32 | 85 | 50 | 11: 00 | 10:00 |
| RODOS | 36 16 22 – 027 56 01 | 63 | 50 | 17: 30 | 16:00 |
| SYROS | 37 27 27 – 024 55 37 | 04 | 25 | 23: 30 | 22:00 |
| 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 | |
| LIMNOS | 39 04 22 – 026 21 15 | 01 | 50 | ||
| MYTILINI | 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.
