Maritime security centre · United States

Office of Naval Intelligence advisories

Recorded as: ONI SPECIAL ADVISORY

U.S. Navy advisories on threats to merchant shipping.

Maritime security centres collect and relay reports of piracy, armed robbery, suspicious approaches and other threats to merchant ships, and advise them on precautions.

What the archive holds

111 messages in this archive record ONI SPECIAL ADVISORY as their authority, issued from 2009-02-10 to 2014-05-08. None of them is in force in the latest lists we collected.

Piracy accounts for 97 of 111 recorded messages (87%), the largest warning type group in this selection.

Located messages lie in 8 sea areas, most often Indian Ocean, Arabian Sea and Gulf of Aden.

The largest yearly count is 2009, with 45 messages.

Across all years its messages are issued most often in November and least often in January.

They reached this archive through HYDROPAC (109) and HYDROLANT (2).

Messages by year of issue

'09
'10
'11
'12
'13
'14

By month of issue, all years

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Warning types

Where

Most recently issued

  1. HYDROLANT 1163/14 · Incidents · South Atlantic Ocean2014-05-07
    Distress signal received, vicinity 05-10S 011-53E at 071721Z may
  2. HYDROPAC 1608/13 · Piracy · Red Sea2013-06-04
    Two vessels attacked vicinity 15-20N 041-50E on 04 jun
  3. HYDROPAC 532/13 · Piracy · Arabian Sea2013-02-22
    M/V attacked in 23-08N 060-49E on 22 feb
  4. HYDROPAC 2334/12 · Piracy2012-08-16
    Current favorable weather conditions and recent suspicious activity indicates the possible presence of…
  5. HYDROPAC 1718/12 · Piracy · Gulf of Aden2012-06-18
    M/V attacked in 14-28N 050-45E at 180928Z jun
  6. HYDROPAC 1596/12 · Piracy · Gulf of Oman2012-06-07
    Pirate action group reported vicinity 25-32N 056-59E
  7. HYDROPAC 1448/12 · Piracy · Gulf of Oman2012-05-23
    M/V attacked in 25-28N 057-20E at 230900Z may
  8. HYDROPAC 1265/12 · Piracy · Gulf of Oman2012-05-04
    M/V hijaked in 25-11N 056-37E at 041924Z may

Earliest in the archive

  1. HYDROPAC 318/09 · Piracy · Gulf of Aden2009-02-10
    Please be advised the weather forecast this week for the gulf of aden calls for favorable small boat…

Other maritime security centres

Counts are messages recording this issuer as their authority, recounted 2026-09-24; see coverage for what is collected. Not for navigation.

Office of Naval Intelligence advisories — navigational warnings it issued · seahazards