Military exercises in the South Atlantic Ocean
Gunnery, firing and naval exercise areas.
- in force
- 3
- last 12 months
- 4
- vs previous 12 (1)
- +300%
- since 1999
- 1,950
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 2024–2026 are under-counted.
In force now · 3
- HYDROLANT 1564/26in force2026-08-13Hazardous operations occur daily from August 18 to 20, 0800Z to 2100Z, within ten miles of 25°06'S 041°13'W.South Atlantic
- HYDROLANT 1462/26in force2026-07-29Hazardous operations are occurring off Brazil in a bounded area from August 3 through September 11.South Atlantic · Brazil
- HYDROLANT 1457/26in force2026-07-29Hazardous operations are in progress in the South Atlantic until 060400Z June 27 near 24-39S 042-30W; two-mile berth requested.South Atlantic
Longest in force
- HYDROLANT 1457/26in force2026-07-29 · 24 dHazardous operations are in progress in the South Atlantic until 060400Z June 27 near 24-39S 042-30W; two-mile berth requested.South Atlantic
- HYDROLANT 1462/26in force2026-07-29 · 24 dHazardous operations are occurring off Brazil in a bounded area from August 3 through September 11.South Atlantic · Brazil
- HYDROLANT 1564/26in force2026-08-13 · 9 dHazardous operations occur daily from August 18 to 20, 0800Z to 2100Z, within ten miles of 25°06'S 041°13'W.South Atlantic
By month (all years)
J
F
M
A
M
J
J
A
S
O
N
D
Other hazards in the South Atlantic Ocean
Archive · 1,947 cancelled
- HYDROLANT 1487/182018-05-13 → 2018-05-18Cancel this msg 181400Z may 18Western South Atlantic · Brazil-south Coast
- HYDROLANT 1460/182018-05-10 → 2018-05-13Hazardous operations 100900Z to 130900Z may in areas bound by: a. 25-01.15S 046-20.87W, 25-01.85S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 1420/182018-05-06 → 2018-05-11Cancel this msg 111400Z may 18Western South Atlantic · Brazil-south Coast
- HYDROLANT 1379/182018-05-02 → 2018-05-11Hazardous operations 071000Z to 112100Z may in area bound by 23-03.08S 043-58.08W, 23-03.16S 044-01.42W,…Western South Atlantic · Brazil-south Coast
- HYDROLANT 1324/182018-04-26 → 2018-04-30Hazardous operations 270900Z to 300900Z apr in areas bound by: a. 25-01.15S 046-20.87W, 25-01.85S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 1294/182018-04-24 → 2018-04-27Hazardous operations 240900Z to 270900Z apr in areas bound by: a. 25-11.50S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 1236/182018-04-19 → 2018-04-24Hazardous operations 241600Z to 241800Z apr: a. in area bound by 23-02.03S 043-51.03W, 23-02.00S 043-35.03W,…Western South Atlantic · Brazil-south Coast
- HYDROLANT 1234/182018-04-19 → 2018-04-19Hazardous operations 241600Z to 241800Z apr in area: a. bound by 23-02.03S 043-51.03W, 23-02.00S 043-35.03W,…Western South Atlantic · Brazil-south Coast
- HYDROLANT 1162/182018-04-11 → 2018-04-15Hazardous operations 120900Z to 150900Z apr in areas bound by: a. 25-11.49S 046-49.14W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 1161/182018-04-11 → 2018-04-17Hazardous operations 1000Z to 1800Z daily 16 and 17 apr in area bound by 23-16.8S 043-02.8W, 23-31.8S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 1107/182018-04-05 → 2018-04-12Hazardous operations 101000Z to 122100Z apr in area bound by 05-56.13S 035-10.01W, 06-09.13S 034-46.19W,…Western South Atlantic · Brazil-northeast Coast
- HYDROLANT 999/182018-03-24 → 2018-03-28Hazardous operations 240900Z to 280900Z mar in areas bound by: a. 25-11.48S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 985/182018-03-23 → 2018-03-26Hazardous operations 230900Z to 260900Z mar in areas bound by: a. 25-11.48S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 976/182018-03-22 → 2018-03-23Hazardous operations 220900Z to 250900Z mar in areas bound by: a. 25-11.48S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 956/182018-03-21 → 2018-03-28Hazardous operations 1000Z to 2100Z daily 26 thru 28 mar in area bound by 05-54.13S 035-10.00W, 05-47.04S…Western South Atlantic · Brazil-northeast Coast
- HYDROLANT 937/182018-03-19 → 2018-03-22Hazardous operations 190900Z to 220900Z mar in areas bound by: a. 25-11.48S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 928/182018-03-17 → 2018-03-24Hazardous operations 191100Z to 232100Z mar in area bound by 02-18.93S 044-22.02W, 02-09.00S 044-24.00W,…Western South Atlantic · Brazil-north Coast
- HYDROLANT 840/182018-03-09 → 2018-03-10Hazardous operations 100300Z to 100800Z mar in: a. 08-04.00S 034-52.30WWestern South Atlantic Brazil-northeast Coast
- HYDROLANT 816/182018-03-07 → 2018-03-09Hazardous operations in progress until 090900Z mar in areas bound by: a. 25-11.50S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 729/182018-03-01 → 2018-03-05Hazardous operations 020900Z to 050900Z mar in areas bound by: a. 25-11.50S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 724/182018-03-01 → 2018-03-05Hazardous operations 020900Z to 050900Z mar in areas bound by: a. 25-11.49S 046-49.14W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 708/182018-03-01 → 2018-03-23Hazardous operations 0830Z to 2030Z daily 05 thru 23 mar in area bound by 05-42.53S 034-45.02W, 05-56.88S…Western South Atlantic · Brazil-northeast Coast
- HYDROLANT 660/182018-02-26 → 2018-03-01Hazardous operations 260900Z feb to 011000Z mar in areas bound by: a. 25-11.49S 046-49.14W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 649/182018-02-24 → 2018-02-28Hazardous operations 250900Z to 280900Z feb in areas bound by: a. 25-11.49S 046-49.14W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 624/182018-02-22 → 2018-03-03Hazardous operations 261100Z feb to 032000Z mar in area bound by 02-18.93S 044-22.20W, 01-32.06S 044-10.71W,…Western South Atlantic · Brazil-north Coast
- HYDROLANT 562/182018-02-16 → 2018-02-19Hazardous operations 160800Z to 190800Z feb in areas bound by: a. 25-11.50S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 558/182018-02-15 → 2018-02-19Hazardous operations 160800Z to 190800Z feb in areas bound by: a. 25-11.50S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 531/182018-02-13 → 2018-02-17Hazardous operations 140800Z to 170800Z feb in area bound by: a. 25-11.50S 046-49.13W, 25-01.17S 046-20.87W,…Western South Atlantic · Brazil-south Coast
- HYDROLANT 364/182018-02-01 → 2018-02-03Hazardous operations 010800Z to 030800Z feb in areas bound by: a. 25-11.50S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 315/182018-01-29 → 2018-02-02Hazardous operations 290800Z jan 18 thru 010800Z feb in areas bound by: a. 25-11.50S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 285/182018-01-26 → 2018-01-31Brazil-south coast DNC 01Western South Atlantic
- HYDROLANT 276/182018-01-25 → 2018-01-30Hazardous operations 301600Z to 302200Z jan in area bound by 25-33S 045-12W, 25-26S 045-01W, 25-34S 044-55W,…Western South Atlantic · Brazil-south Coast
- HYDROLANT 274/182018-01-25 → 2018-01-30Hazardous operations 300800Z to 301500Z jan in area within 20 miles of 26-00S 045-45WWestern South Atlantic · Brazil-south Coast
- HYDROLANT 260/182018-01-24 → 2018-01-29Hazardous operations 291600Z to 291900Z jan in area within eight miles of 05-25S 034-45WWestern South Atlantic · Brazil-northeast Coast
- HYDROLANT 136/182018-01-12 → 2018-01-15Hazardous operations 120800Z to 150800Z jan in areas bound by: a. 25-11.50S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 95/182018-01-08 → 2018-01-14Hazardous operations 141000Z to 141500Z jan in area within 20 miles of 27-44S 045-48WWestern South Atlantic
- HYDROLANT 78/182018-01-08 → 2018-01-13Hazardous operations 131000Z to 131500Z jan in area within 15 miles of 25-06S 044-45WWestern South Atlantic · Brazil-south Coast
- HYDROLANT 62/182018-01-06 → 2018-01-12B. 25-25.43S 047-17.38W, 25-05.19S 046-48.05W, 25-07.25S 046-37.68W, 25-01.33S 046-20.87W, 25-02.02S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 32/182018-01-04 → 2018-01-09Hazardous operations 091000Z to 091400Z jan in area within ten miles of 23-20S 042-23WWestern South Atlantic · Brazil-southeast Coast
- HYDROLANT 17/182018-01-03 → 2018-01-06B. 25-25.43S 047-17.38W, 25-05.20S 046-48.05W, 25-07.25S 046-37.68W, 25-01.33S 046-20.87W, 25-02.02S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 4228/172017-12-29 → 2018-01-01B. 25-25.43S 047-17.38W, 25-05.19S 046-48.05W, 25-07.25S 046-37.68W, 25-01.33S 046-20.87W, 25-02.02S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 4192/172017-12-27 → 2017-12-30B. 25-25.43S 047-17.38W, 25-05.20S 046-48.05W, 25-07.25S 046-37.68W, 25-01.33S 046-20.87W, 25-02.02S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 4169/172017-12-24 → 2017-12-27B. 25-25.43S 047-17.38W, 25-05.20S 046-48.05W, 25-07.25S 046-37.68W, 25-01.33S 046-20.87W, 25-02.02S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 4141/172017-12-20 → 2017-12-24Hazardous operations 210800Z to 240800Z dec in areas bound by: a. 25-11.50S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 4078/172017-12-16 → 2017-12-20Hazardous operations 170800Z to 200800Z dec in areas bound by: a. 25-11.50S 046-49.13W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 4073/172017-12-15 → 2017-12-16Hazardous operations 200900Z to 201900Z dec in area within ten miles of 13-30S 038-30WWestern South Atlantic · Brazil-east Coast
- HYDROLANT 4022/172017-12-13 → 2017-12-19Hazardous operations 1500Z to 1700Z daily 18 and 19 dec in area bound by 23-02.03S 043-51.03W, 23-02.00S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 3953/172017-12-08 → 2017-12-11Hazardous operations 080800Z to 110800Z dec in areas bound by: a. 25-11.49S 046-49.14W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 3930/172017-12-05 → 2017-12-09Hazardous operations 060800Z to 090800Z dec in areas bound by: a. 25-11.49S 046-49.14W, 25-01.17S…Western South Atlantic · Brazil-south Coast
- HYDROLANT 3892/172017-12-02 → 2017-12-03Hazardous operations in progress until 030800Z dec in areas bound by: a. 25-11.49S 046-49.14W, 25-01.17S…Western South Atlantic · Brazil-south Coast
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.