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Buoy 4M (main channel) unlit off the Portuguese coast
No longer in forceReceived 26 Sept 2026, 00:00 UTCArchived 16 Oct 2026, 17:06 UTC
Warning text
Positions open on the map1. Informa-se que a boia Nº 4M Canal Principal (LL 97.4) na posição (WGS84) 40º 39,60´ N - 08º 42,42´ W, encontra-se apagada.
2. Solicita-se a toda a navegação a devida atenção e resguardo adequado.
POSITION: 40-35.71N 008-47.25W
POSITION: 40-40.71N 008-47.25W
POSITION: 40-40.71N 008-39.38W
POSITION: 40-35.71N 008-39.38W
Location map
Open on the full mapAnalysis
No longer in forceBuoy No. 4M of the main channel (LL 97.4) is reported unlit at the stated WGS84 position. Mariners are advised to exercise caution and take appropriate precautions when navigating the area. Four bounding positions are provided.
Exercise caution and take appropriate precautions when navigating the area.
- Type
- Aids to navigation · severity low
- Feed
- Aids to navigationAll warnings of this kind on the map, or as an API feed.
- Location
- Main channel (Portugal coast)
- Hazards
- unlit buoy, aids to navigation unlit
Coast stations for this area
- RCCMRSC VigoSpain95 NM from the area
- RCCMRCC FinisterreSpain123 NM from the area
- RCCMRCC BilbaoSpain217 NM from the area
- DSCDSC Station La GuardiaMRCC FinisterreSpainMMSI 002241022VHF 35range 35 NM74 NM from the area
- DSCDSC Station VigoMRSC VigoSpainMMSI 002241022VHF 35range 35 NM91 NM from the area
- DSCDSC Station FinisterreMRCC FinisterreSpainMMSI 002241022VHF 35, MF 150range 150 NM138 NM from the area
- DSCDSC Station Coruna CCRMRSC CorunaSpainMMSI 002241022VHF 35, MF 150range 150 NM152 NM from the area
- DSCDSC Station CorunaSpainMMSI 002240992MF, HF163 NM from the area
Aids to navigation affected
- UnlitBoia Nº 4M Canal Principal · LL 97.4 · 40º 39,60´ N - 08º 42,42´ W
No aids-to-navigation list in the database yet; aids are shown as the warning names them.
Worked out automatically from the warning text on 27 Sept 2026, 20:17 UTC. It can be wrong: the official warning text is the authority.