Survey operations in 2025

Hydrographic and scientific survey vessels, often towing long arrays.

issued in 2025
7
still in force
7
vs 2024
-97%
first · last
05-24 · 12-31

Coverage note: the NGA archive ends 2024-05 and live collection began 2026-08-17. Warnings issued in between are here only if they were still in force when collection started, so this year is under-counted.

By month

J
F
M
A
M
J
J
A
S
O
N
D

By NAVAREA series

  • HYDROLANT2
  • HYDROPAC2
  • NAVAREA IV2
  • NAVAREA XII1

Where · top seas

North Atlantic Ocean229%
Bering Sea229%
South Atlantic Ocean114%
Black Sea114%
Persian Gulf114%

All survey operations issued in 2025 · 7

  1. NAVAREA IV 1431/25in force2025-12-31
    Survey operations by vessel BOS PRINCESS continue until 31 Dec 2026 off Guyana; wide berth requested.
    North Atlantic · Guyana
  2. NAVAREA IV 1430/25in force2025-12-31
    Underwater operations by vessel Aldemir Souza Tide continue until 31 Dec 2026 in the North Atlantic; wide berth requested.
    North Atlantic
  3. HYDROLANT 2243/25in force2025-12-30
    Survey operations by three vessels in the Black Sea off Turkey from January 1 to September 8, 2026, in a bounded area. Five mile berth requested.
    Black Sea · Turkey
  4. HYDROLANT 2010/25in force2025-11-28
    Underwater survey operations by vessel Fugro Vaquita off Brazil daily from 10:00 to 20:00 UTC until November 2, 2026; wide berth requested.
    South Atlantic · Brazil
  5. HYDROPAC 1795/25in force2025-07-14
    A scientific mooring at seven meters depth is established in Bering Strait, Russia, at 66-19.56N 168-57.08W.
    Bering Strait · Russia
  6. NAVAREA XII 422/25in force2025-07-14
    Scientific moorings are established at 15 meters depth in Bering Strait, Alaska, at coordinates 65-46.86N 168-34.07W and 65-44.76N 168-15.75W.
    Bering Strait · Alaska
  7. HYDROPAC 1357/25in force2025-05-24
    Underwater operations are underway by vessel HYSY289 in the Persian Gulf off Qatar, within coordinates 26-41.99N 051-53.26E to 26-37.70N 051-53.23E, wide berth requested.
    Persian Gulf · Qatar

Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts and your national MSI service.

Survey operations in 2025 · seahazards