# Ship Security Alert System

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Security alert system for ships

The SSAS should be capable of activation from the ship's navigation bridge

The **Ship Security Alert System** (**SSAS**) is provided to a [ship](/source/Ship) for the purpose of transmitting a security alert to the shore to indicate to a competent authority (typically the ship's flag State) that the security of the ship is under threat or has been compromised.[1][2][3][4] In case of a security incident, that may include attempted or actual [piracy](/source/Piracy), [terrorism](/source/Terrorism),[5] armed robbery and similar attacks, the ship's SSAS can be activated by the Master and responsible members of the crew to continuously send silent alerts to the flag State, as well as predefined recipients that include the ship's owner (company).[6] The SSAS therefore forms an integral part of the security system for almost all [merchant ships](/source/Merchant_ship).[1]

## Requirement

The [SOLAS Convention](/source/SOLAS_Convention) (Chapter XI-2, Regulation 6) which enforces the [International Ship and Port Facility Security (ISPS) Code](/source/International_Ship_and_Port_Facility_Security_Code) on [maritime security](/source/Maritime_security) requires all ships over 500 GT to be equipped with an SSAS.[1][3][7] Only exception are non-passenger vessels of less than 500 GT constructed before 1 July 2004.[8]

## Operation

Technically, the SSAS consists of a [GPS receiver](/source/Global_Positioning_System) linked to a [transmitter](/source/Transmitter), a [power supply](/source/Power_supply), [software](/source/Software) and activation buttons.[9]

There must be at least two independent activation points on the ship, one on the [navigation bridge](/source/Bridge_(nautical)) and the other(s) in places immediately accessible by the crew.[10] This may include the [engine room](/source/Engine_room), [master](/source/Sea_captain)'s [cabin](/source/Cabin_(ship)) or the crew lounge. The locations of the SSAS activation points and relevant procedure for use must be detailed in the ship's security plan (also required by the ISPS Code).[11] The activation points must be so designed that they cannot be inadvertently activated.[3]

When the ship is under attack, the crew can activate the SSAS beacon by pressing a button which automatically sends a message, usually SMS or email, over satellite connection to predefined recipients such as the [ship owner](/source/Ship_owner), [fleet manager](/source/Fleet_management) and [flag state](/source/Flag_state). An SSAS report contains the ship name, unique identification numbers like [MMSI](/source/Maritime_Mobile_Service_Identity), [IMO number](/source/IMO_number) and [call sign](/source/Call_sign), the date and time, the ship's current position, speed and course. No audible or visible alarm is generated while the SSAS report is being transmitted to prevent discovery of the report by the intruders. Equally, an overt radio/phone acknowledgment of the alert is also not made in case it poses a threat to crew if they have been captured.[10] Once the SSAS button is pressed, the alert will be continuously transmitted to the recipients unless it is reset or deactivated. An SSAS beacon operates with similar principles to the [aircraft transponder emergency code 7500](/source/Transponder_(aviation)#Emergency_codes).[12]

The alert receivers (the ship's flag State) are obliged to inform the national authorities of the coastal states where the ship is sailing, so that help from nearby coastal State security forces can be dispatched to the location of the ship.[10]

## See also

- [Transport portal](https://en.wikipedia.org/wiki/Portal:Transport)

- [Cospas-Sarsat](/source/Cospas-Sarsat)

- [GMDSS](/source/GMDSS)

- [Long-Range Identification and Tracking](/source/Long-range_identification_and_tracking_(ships)) (LRIT)

## References

1. ^ [***a***](#cite_ref-n419_1-0) [***b***](#cite_ref-n419_1-1) [***c***](#cite_ref-n419_1-2) Herbert-Burns, Rupert; Bateman, Sam; Lehr, Peter (2008-09-24). *Lloyd's MIU Handbook of Maritime Security*. CRC Press. [ISBN](/source/ISBN_(identifier)) [978-1-04-008124-2](https://en.wikipedia.org/wiki/Special:BookSources/978-1-04-008124-2).

1. **[^](#cite_ref-g667a_2-0)** McNicholas, Michael (2016-03-19). *Maritime Security*. Butterworth-Heinemann. p. 431. [ISBN](/source/ISBN_(identifier)) [978-0-12-803673-0](https://en.wikipedia.org/wiki/Special:BookSources/978-0-12-803673-0).

1. ^ [***a***](#cite_ref-e785_3-0) [***b***](#cite_ref-e785_3-1) [***c***](#cite_ref-e785_3-2) Dickie, John W (2014-05-08). *Reeds 21st Century Ship Management*. London: A&C Black. p. 111. [ISBN](/source/ISBN_(identifier)) [978-1-4729-0068-5](https://en.wikipedia.org/wiki/Special:BookSources/978-1-4729-0068-5).

1. **[^](#cite_ref-4)** ["Resolution MSC.136(76) Performance Standards For A Ship Security Alert System"](https://wwwcdn.imo.org/localresources/en/KnowledgeCentre/IndexofIMOResolutions/MSCResolutions/MSC.136(76).pdf) (PDF). International Maritime Organization. 11 December 2002. Retrieved 10 December 2023.

1. **[^](#cite_ref-u819_5-0)** Bowley, Robin (2022-12-23). *Preventing Terrorist Attacks at Sea*. Taylor & Francis. [ISBN](/source/ISBN_(identifier)) [978-1-000-81140-7](https://en.wikipedia.org/wiki/Special:BookSources/978-1-000-81140-7).

1. **[^](#cite_ref-b495_6-0)** Cartner, John A. C.; Fiske, Richard; Leiter, Tara (2013-03-01). *The International Law of the Shipmaster*. Routledge. p. 107. [ISBN](/source/ISBN_(identifier)) [978-1-136-65397-1](https://en.wikipedia.org/wiki/Special:BookSources/978-1-136-65397-1).

1. **[^](#cite_ref-d642_7-0)** Corbett, Peter; Hill, Peter (2009). *A Modern Plague of Pirates*. East Mersea: Captain Peter Corbett. p. 41. [ISBN](/source/ISBN_(identifier)) [978-0-9562107-0-8](https://en.wikipedia.org/wiki/Special:BookSources/978-0-9562107-0-8).

1. **[^](#cite_ref-xi2_8-0)** ["CHAPTER XI-2 Special Measures To Enhance Maritime Security"](https://www.classnk.or.jp/hp/pdf/activities/statutory/isps/code/SOLAS-XI-2-e.pdf) (PDF). Retrieved 10 December 2023.

1. **[^](#cite_ref-9)** ["Do you know what a Ship Security Alert System is?"](https://safety4sea.com/cm-do-you-know-what-a-ship-security-alert-system-is/). *SAFETY4SEA*. 22 January 2020. Retrieved 10 December 2023.

1. ^ [***a***](#cite_ref-k925_10-0) [***b***](#cite_ref-k925_10-1) [***c***](#cite_ref-k925_10-2) Kraska, James; Pedrozo, Raul (2013-04-15). *International Maritime Security Law*. Leiden: Martinus Nijhoff Publishers. p. 489. [ISBN](/source/ISBN_(identifier)) [978-90-04-23357-7](https://en.wikipedia.org/wiki/Special:BookSources/978-90-04-23357-7).

1. **[^](#cite_ref-g667_11-0)** McNicholas, Michael (2016-03-19). *Maritime Security*. Butterworth-Heinemann. p. 98. [ISBN](/source/ISBN_(identifier)) [978-0-12-803673-0](https://en.wikipedia.org/wiki/Special:BookSources/978-0-12-803673-0).

1. **[^](#cite_ref-12)** ["What is Ship Security Alert System (SSAS)?"](https://www.marineinsight.com/marine-piracy-marine/what-is-ship-security-alert-system-ssas/). *Marine Insight*. 28 June 2019. Retrieved 10 December 2023.

## External links

Media related to [Ship Security Alert System](https://commons.wikimedia.org/wiki/Category:Ship_Security_Alert_System) at Wikimedia Commons

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Adapted from the Wikipedia article [Ship Security Alert System](https://en.wikipedia.org/wiki/Ship_Security_Alert_System) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Ship_Security_Alert_System?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.