SOLAS Convention

The International Convention for the Safety of Life at Sea (SOLAS) is an international maritime treaty which sets out minimum safety standards in the construction, equipment and operation of merchant ships. The International Maritime Organization convention requires signatory flag states to ensure that ships flagged by them comply with at least these standards.
Initially prompted by the sinking of the Titanic, the current version of SOLAS is the 1974 version, known as SOLAS 1974, which came into force on 25 May 1980, and has been amended several times. As of April 2022, SOLAS 1974 has 167 contracting states, which flag about 99% of merchant ships around the world in terms of gross tonnage.
SOLAS in its successive forms is generally regarded as the most important of all international treaties concerning the safety of merchant ships.
The non-parties to SOLAS 1974 include numerous landlocked countries, as well as El Salvador, Micronesia and East Timor. Some others including Bolivia, Lebanon and Sri Lanka, all considered flag of convenience states, are deemed to have "potentially negative performance" regarding ratification.
SOLAS 1974 requires flag states to ensure that ships flagged by them comply with the minimum safety standards in the construction, equipment and operation of merchant ships. The treaty includes articles setting out general obligations, etc., followed by an annexe divided into twelve chapters, two new chapters were added in 2016 and 2017. Of these, chapter five (often called 'SOLAS V') is the only one that applies to all vessels on the sea, including private yachts and small craft on local trips as well as to commercial vessels on international passages. Many countries have turned these international requirements into national laws so that anybody on the sea who is in breach of SOLAS V requirements may find themselves subject to legal proceedings.
The first version of SOLAS Treaty was passed in 1914 in response to the sinking of RMS Titanic, which prescribed numbers of lifeboats and other emergency equipment along with safety procedures, including continuous radio watches. The 1914 treaty never entered into force due to the outbreak of the First World War.
Further versions were adopted in 1929 and 1948.
The 1960 Convention was adopted on 17 June 1960 and entered into force on 26 May 1965. It was the fourth SOLAS Convention and was the first major achievement for the International Maritime Organization (IMO). It represented a considerable step forward in modernizing regulations and keeping up with technical developments in the shipping industry.
In 1974, a completely new Convention was adopted to allow SOLAS to be amended and implemented within a reasonable timescale, instead of the previous procedure to incorporate amendments, which proved to be very slow. Under SOLAS 1960, it could take several years for amendments to come into force since countries had to give notice of acceptance to IMO and there was a minimum threshold of countries and tonnage. Under SOLAS 1974, amendments enter into force via a tacit acceptance procedure – this allows an amendment to enter into force on a specified date, unless objections to an amendment are received from an agreed number of parties.
The 1974 SOLAS came into force on 25 May 1980, 12 months after its ratification by at least 25 countries with at least 50% of gross tonnage. It has been updated and amended on numerous occasions since then and the Convention in force today is sometimes referred to as SOLAS, 1974, as amended.
In 1975 the assembly of the IMO decided that the 1974 convention should in future use SI (metric) units only.
In particular, amendments in 1988 based on amendments of International Radio Regulations in 1987 replaced Morse code with the Global Maritime Distress Safety System (GMDSS) and came into force beginning 1 February 1992. The issues covered by the treaty are set out in the list of sections (above). Further amendments were made in May 2011.
In 2015, the SOLAS Container Weight Verification Regulation VI/2 amended SOLAS. This regulation, implemented by the IMO Maritime Safety Committee (MSC), requires that the full (gross) weight of all loaded containers must be obtained prior to being loaded on board an ocean vessel. Weight can be calculated either by weighing the loaded container or weighing the cargo elements and packaging and adding this weight to the unladen container weight. Communicating a weight value has incurred a need to introduce a new Electronic Data Interchange (EDI) communication protocol called VGM (Verified Gross Mass) or VERMAS (Verification of Mass), and involves cooperation between ocean carriers, freight forwarders/NVOCCs, EDI providers as well as exporters. The regulation states that exporters (shippers) are ultimately responsible for obtaining a verified container weight. Originally scheduled for implementation on 1 July 2016, the regulation allowed for flexibility and practical refinement until 1 October 2016.
An up-to-date list of amendments to SOLAS is maintained by the IMO.