OA99

SÉCURITÉ

Seismic survey off Chennai 10-24 Nov 2026

Activeuntil 24 Nov 2026, 23:59 UTC (in 12 days)Received 09 Nov 2026, 00:00 UTC

Warning text

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INDIAN NAV WARNING (INW) 959. OFF CHENNAI CHARTS IN 32 391 SW DUCHESS WILL CARRY OUT SEISMIC SURVEY FROM 10 TO 24 NOV 26 IN AREA BOUNDED BY 14-12.00N 081-13.00E, 13-34.00N 081-51.00E, 13-12.00N 081-26.00E, 13-50.00N 080-48.00E

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Analysis

Activeuntil 24 Nov 2026, 23:59 UTC (in 12 days)

A seismic survey vessel (SW DUCHESS) will carry out operations off Chennai. Activity is planned from 10 to 24 November 2026 in the area bounded by the four positions given. Mariners should be aware of towed seismic equipment in the area and navigate with caution.

Type: Survey operations · severity moderate
Feed: Survey operationsAll warnings of this kind on the map, or as an API feed.
Location: Off Chennai
Validity: From 10 Nov 2026, 00:00 UTC
Until 24 Nov 2026, 23:59 UTCFROM 10 TO 24 NOV 26
Activity periods: 10 Nov 2026, 00:00 UTC - 24 Nov 2026, 23:59 UTC (seismic survey (SW DUCHESS))
Hazards: seismic survey, towed seismic equipment

Worked out automatically from the warning text on 09 Nov 2026, 12:10 UTC. It can be wrong: the official warning text is the authority.

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This warning's analysis also has:

Action for mariners
Ships named
Charts
Translations
Nearby lights and rescue centres

The action for mariners, the keep-clear distance, contacts, ships named, translations and the nearby lights and rescue centres come with Lagom and every higher plan, and with the API plans. The official warning text above is always free.

See the plans

Keywordsseismic survey

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