Shipping Emergencies- Search and Rescue
When maritime nations gathered together in 1914 to develop the first international shipping safety convention, following the loss of the Titanic two years earlier, the focus was not just on preventing shipping accidents but also improving the chances of survival if one should occur. That conference resulted in the adoption of the International Convention for the Safety of Life at Sea (SOLAS), which included regulations on provision of life-saving equipment and the safety of navigation.
SOLAS, which has since been revised and updated many times, later came under the auspices of the International Maritime Organization (IMO), which assumed global responsibility for shipping when it came into being in 1959. While accident prevention is a major goal of the Organization, IMO has also concentrated efforts on developing world-wide, integrated systems to respond to shipping emergencies. The most significant of these are the International Convention on Maritime Search and Rescue (SAR) and the Global Maritime Distress and Safety System (GMDSS).
The GMDSS - which became fully effective from 1 February 1999 - is essentially a worldwide network of automated emergency communications for ships at sea. It means that all ocean‑going passenger ships and cargo ships of 300 gross tonnage and upwards must be equipped with radio equipment that conforms to international standards as set out in the system. The basic concept is that search and rescue authorities ashore, as well as shipping in the immediate vicinity of the ship in distress, can be rapidly alerted through satellite and terrestrial communication techniques to a distress incident so that they can assist in a coordinated SAR operation with the minimum of delay.
The 1979 SAR Convention was designed to provide a global system for responding to emergencies and the GMDSS was established to provide it with the efficient communication support it needs. Both the GMDSS and SAR are crucial to maritime safety and they are designed to ensure that any emergency at sea will result in a distress call and the response to that call will be immediate and effective.Although the obligation of ships to go to the assistance of vessels in distress was enshrined both in tradition and in international treaties (such as SOLAS), there was, until the adoption in 1979 of the International Convention on Maritime Search and Rescue (SAR), no international system covering search and rescue operations. In some areas there was a well‑established organization able to provide assistance promptly and efficiently, in others there was nothing at all.
Co‑ordination and control of search and rescue operations was organized by each individual country in accordance with its own requirements and as dictated by its own resources. As a result, national organizational plans were developed along different lines. The dissimilarity of such plans and lack of agreed and standardized procedures on a world‑wide basis could give rise to difficulties, particularly at the initial stages of alert. In some cases, this could result in an uneconomical use of search and rescue facilities or in unnecessary duplication of effort.
IMO was charged with improving this situation and, as a first step, a manual on search and rescue operations was prepared for the guidance of those requiring assistance at sea or who find themselves in a position to provide assistance to others. It was adopted by the IMO Assembly in 1971 under the title of the Merchant Ship Search and Rescue Manual (MERSAR). It was updated several times with the latest amendments being adopted in 1992 - they entered into force in 1993.
MERSAR provided guidance for those who, during emergencies at sea, may require assistance from others or who may be able to provide assistance themselves. In particular, it was designed to aid the master of any vessel who might be called upon to conduct SAR operations at sea for persons in distress.
In 1978, the Maritime Safety Committee (MSC) of IMO, adopted a second manual called the IMO Search and Rescue Manual (IMOSAR)to help Governments to implement the International Convention on Maritime Search and Rescue. The manual provided guidelines rather than requirements for a common maritime search and rescue policy, encouraging all coastal States to develop their organizations on similar lines and enabling adjacent States to co‑operate and provide mutual assistance. It was also updated in 1992, with the amendments entering into force in 1993.
The manual was aligned as closely as possible with the International Civil Aviation Organization (ICAO) Search and Rescue Manual to ensure a common policy and to facilitate consultation of the two manuals for administrative or operational reasons. MERSAR was also aligned, where appropriate, with IMOSAR.
The MERSAR and IMOSAR manuals have now been replaced with a combined manual, published in three volumes, called the International Aeronautical and Maritime Search and Rescue (IAMSAR) manual.
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In1979, a conference convened by IMO in Hamburg, Germany adopted the International Convention on Maritime Search and Rescue (SAR Convention), which entered into force in 1985. The aim was to develop an international SAR plan, so that, no matter where an accident occurs, the rescue of persons in distress at sea will be co‑ordinated by a SAR organization and, when necessary, by co‑operation between neighbouring SAR organizations.
The Convention will establish preparatory measures which should be taken, including the establishment of rescue co‑ordination centres and sub-centres. It outlines operating procedures to be followed in the event of emergencies or alerts and during SAR operations. This includes the designation of an on‑scene commander and his duties.
Under the Convention, the world's oceans have been divided into 13 areas for search and rescue purposes.
Parties to the Convention are required to ensure that arrangements are made for the provision of adequate SAR services in their coastal waters. Parties are encouraged to enter into SAR agreements with neighbouring States involving the establishment of SAR regions, the pooling of facilities, establishment of common procedures, training and liaison visits including taking measures to expedite entry into its territorial waters of rescue units from other Parties. The Convention also encouraged the Parties to establish ship reporting systems, where these are deemed necessary, under which ships report their position to a coast radio station. This enables the interval between the loss of contact with a vessel and the initiation of search operations to be reduced. It also helps to permit the rapid determination of vessels which may be called upon to provide assistance including medical help when required.
The SAR Convention was designed to provide the framework for search and rescue operations. It and the two associated manuals, together with other resolutions and recommendations adopted at the 1979 Conference, should ensure that such operations are conducted with maximum speed and efficiency, no matter where the distress incident occurs. But its effectiveness depends almost entirely on how well it is implemented and this depends in turn on the action taken by Parties to the Convention.
Because the Convention imposes considerable obligations on Parties - such as setting up the shore installations required - the Convention has not been ratified by as many countries as some other treaties. By the end of 1997, for example, the SAR Convention had been ratified by only 56 countries, whose combined merchant fleets represented less than 50% of world tonnage. Equally important, many of the world's coastal States had not accepted the Convention and the obligations it imposes.As a result, the development of SAR plans in the 13 areas has been relatively slow and by 1995 - ten years after the Convention entered into force - provisional SAR plans had only been drawn up for nine regions.It was generally agreed that one reason for the small number of acceptances and the slow pace of implementation was due to problems with the SAR Convention itself and that these could best be overcome by amending the Convention. The Sub-Committee on Radio-Communications and Search and Rescue (COMSAR) was requested to revise the Convention. A draft text was prepared and was approved by the 68th session of the MSC in May 1997, and was then adopted by the 69th MSC session in May 1998. The revised Convention entered into force on 1 January 2000.The revised SAR Convention clarifies the responsibilities of Governments and puts greater emphasis on the regional approach and co-ordination between maritime and aeronautical SAR operations. It is hoped the revised Convention will be more acceptable to those States which have not yet ratified the 1979 SAR Convention - as of 2 October 2000, the SAR Convention had been ratified by only 65 countries, whose combined merchant fleets represent less than 50% of world tonnage.During the last few years, a major effort has been made to improve the implementation of the SAR Convention, particularly in facilitating the preparation of a global search and rescue plan, which is the ultimate objective of the Convention.Starting in 1981, IMO organized a series of seminars and conferences in order to prepare and agree SAR plans for the oceans' 13 search and rescue areas, including the delimitation of individual countries' search and rescue regions for which they are responsible.
The table below shows the seminars and conferences that have been held.
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SAR
and the GMDSS - seminars and conferences organized by IMO
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Venue and Year |
SAR
Area
|
Type of Meeting |
Result |
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Barbados
1981
Caracas 1984 |
Caribbean Sea Ditto |
Seminar Conference |
Preparation of provisional SAR plan Agreement on a provisional SAR plan |
|
Jakarta 1984 Tokyo 1986 |
Asia and Pacific Ditto |
Seminar Conference |
Preparation of provisional SAR plan Agreement on a provisional SAR plan |
|
Lagos 1984 Lagos 1991 |
Eastern
South Atlantic |
Seminar Conference |
Preparation of provisional SAR plan Agreement on a provisional SAR plan |
|
Sharjah
1992 Mombasa
1992 Cape Town 1996 |
North West Indian Ocean West Indian Ocean South West Indian Ocean |
Seminar
|
Preparation of provisional SAR plan
|
|
Lisbon 1994 |
Atlantic Ocean |
Conference |
Agreement on an integrated provisional SAR plan |
|
Varna 1994 Istanbul 1996 Valencia 1997 Ankara 1998 |
Black Sea Ditto Ditto Ditto |
Seminar Conference Conference Conference |
Preparation of provisional SAR plan Preparation of provisional SAR plan General agreement on a provisional SAR plan Signing of an Agreement on co-operation regarding maritime SAR services |
|
Toulon
1995 Valencia 1997 |
Mediterranean
Sea |
Seminar Conference |
Preparation
of provisional SAR plan General agreement on a provisional SAR plan |
|
Seoul 1997 |
Pacific Ocean |
Conference |
Agreement on an integrated provisional SAR plan |
|
Fremantle 1998 |
Indian Ocean |
Conference |
Agreement on an integrated provisional SAR plan |
The SAR Convention has provided a global plan for carrying out SAR operations. What it cannot do is to improve the communications which are so important in search and rescue operations. That is where the GMDSS comes in.The GMDSS was introduced by means of amendments to SOLAS which were adopted in 1988 and entered into force on 1 February 1992. It became fully operational on 1 February 1999.On that date, the Morse Code was phased out and all passenger ships and all cargo ships of 300 gross tonnage and upwards on international voyages are now required to carry equipment designed to improve the chances of rescue following an accident, including satellite emergency position indicating radio beacons (EPIRBs) and search and rescue transponders (SARTs) for the location of the ship or survival craft.
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GMDSS Countdown |
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Between 1 February 1992 and 1 February 1999 existing ships can comply with the Chapter IV of SOLAS in force prior to 1 1992 or the GMDSS. |
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All ships have been required to carry a NAVTEX (transmission of maritime safety information) receiver and satellite EPIRBs (emergency position-indicating radio beacons) since 1 April 1993 |
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Ships built on or after 1 February 1995 must comply with all applicable GMDSS requirements |
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On 1 February 1999 all passenger ships and all cargo ships of 300 gross tonnage and upwards on international voyages must comply with the GMDSS |
The GMDSS was designed to have a major impact on safety at sea and has already saved many lives. The different systems involved offer great flexibility and will certainly develop in the future as new technology is introduced. But it is based on an invention made just over a hundred years ago and which was first used for a rescue at sea in 1899 - radio.
Until the invention of radio, there was little a ship could do if it was in trouble on the high seas, except set off flares and hope a ship in the vicinity would see and come to the rescue. The invention of radio by Guglielmo Marconi in 1895, and the subsequent development of the technology of radiocommunication through the efforts of several other scientists, created a revolution in maritime communications. At that time, telephony and telegraphy were of little use at sea, since they both depended upon cables and once a ship was out of sight of land it was effectively cut off from all contact with other persons, except for the chance sighting of another vessel.The first rescue at sea resulting from a radio message was in 1899, when the lightship Goodwin Sands in the Straits of Dover sent a message ashore when the steamship Elbe ran aground, enabling a lifeboat to be launched in time to rescue the ship's crew.In 1903, a radio conference held in Berlin considered preliminary studies for the international regulation of radio-communications. One of the main decisions made was to require coast radio stations to receive and transmit telegrams originating from or destined for ships at sea, no matter from which radio system they originated.In 1906, the first international radiotelegraph conference was held, also in Berlin, and adopted a convention modelled on the successful International Telegraph Convention of 1875. Contracting Parties to the convention were obliged to connect coast radio stations to the international telegraph network, to give absolute priority to all distress messages and to avoid radio interference as much as possible. This 1906 conference laid the basis for the development of radiocommunications at sea.
Titanic disaster
The increasing number of accidents at sea showed the importance of radiocommunications in saving lives.The most famous of these occurred in 1912 when the Titanic sank with the loss of more than 1,500 lives. Although 700 lives were saved when the liner Carpathia picked up the Titanic's distress message, the death toll may have been reduced had the Californian, which was a relatively short distance from the scene, done the same. Unfortunately her radio officer was off duty.
Three months after the Titanic disaster, another international radio conference met, this time in London. Although it was decided that the installation of radio equipment on board all ships should not be made internationally obligatory, steps were taken to improve radio coverage, with some ships being required to maintain a permanent radio watch.
At the conference, the letters "SOS" were adopted as the international distress call (previously it had been CQD). Contrary to popular myth, the letters are not an abbreviation (for "Save Our Souls") and have no special significance except that the familiar "... ‑‑‑ ..." is easy to remember and transmit in the Morse Code. (The "Mayday" distress call used in radiotelephony is a corruption of the French "m'aider" which simply means "help me".)
Two years later, in 1914, the first International Convention for the Safety of Life at Sea (SOLAS) was adopted. Ships carrying more than 50 passengers were required to be equipped with a radio installation having a range of at least 100 nautical miles. An important regulation required larger passenger ships to maintain a continuous radio listening watch.The convention also made it an obligation for ships receiving a distress call to go to the assistance of the ship concerned and gave the master of a ship in distress the right to requisition the services of any ships answering his call.The problem of providing a continuous radio watch, for example, had to some extent been solved by the development of the radiotelegraph automatic alarm and the second SOLAS convention (1929) allowed some exceptions regarding watchkeeping for ships fitted with such a device. Another regulation required larger passenger ships to have some lifeboats equipped with radio equipment.The 1948 SOLAS Convention made the carriage of a radio installation a requirement for all passenger ships and for cargo ships of 500 gross tonnage and above. The new convention also took into account other developments in radiocommunications, including radio-telephony on ships of 500‑1,600 gross tonnage and radio direction finding. With the introduction of miniaturization in the form of transistors in the 1950s. This made it possible to use much higher frequencies than before and also helped to reduce the size of the radio installation and power consumption.In 1960, a new SOLAS Convention was adopted and dedicated to communications at sea for distress and safety purposes, which were made much more detailed than those of previous conventions. It placed the same emphasis on ensuring that equipment conformed to stringent conditions; the maintenance of adequate radio watches; the fitting of radio equipment in certain lifeboats and references were made to the Radio Regulations adopted by the International Telecommunication Union (ITU), another specialized agency of the United Nations system. In SOLAS l960, a radiotelephone station was made mandatory on all ships of 300‑1,600 gross tonnage, unless fitted with a radiotelegraph station.IMO adopted a new SOLAS convention in 1974 with further improvement on the use and deployment of radiotelegraphy and radiotelephony. It mainly deals with facilities intended for distress and safety purposes and does not specifically provide for equipment intended for public correspondence. The technical requirements of equipment intended for this purpose are covered by the Radio Regulations of the ITU. In 1981, some of the regulations dealing with radiotelegraphy and radiotelephony were replaced and others amended. These amendments entered into force on 1 September 1984.The carriage of very high frequency (VHF) radiotelephony (which had been recommended by IMO since 1975) was made mandatory on all ships of 300 gross tonnage and above by the 1981 amendments to SOLAS 1974.
Radio has helped to save the lives of tens of thousands of people involved in maritime disasters, but conventional terrestrial radio does have a number of serious drawbacks that had become more apparent when IMO met for the first time in 1959. They included the following:
• Reception difficulties:the quality of some messages can be adversely affected by changes in propagation conditions. • Uncertainty of the message being received:the maximum range of the mandatory telegraphy and telephony equipment is only about 250 kilometres. A message transmitted from a ship in mid‑ocean is therefore unlikely to be received on shore. The service is primarily a ship‑to‑ship service and depends on another ship being within range. [1] • The need for specialization:Morse telegraphy, the basis of the radio service, required many years of training and practice. If something happened to the radio operator, it was unlikely that anyone else on board would be able to use the telegraphy equipment. • Congestion: the development of radio on land meant that competition for frequencies became fierce. There was little chance of the frequencies allocated for maritime purposes being increased.It would have been difficult if not impossible to solve these problems using technology in existence in the 1950s. Then in 1962, the Telstar, the world's first telecommunications satellite was launched.
Satellites offered a number of advantages over conventional radio systems. One of the most important is the fact that they offer a solution to the problem that radio messages travel in straight lines. Because they do not follow the curve of the Earth's surface eventually they disappear into space (except on HF). Radio messages sent via a satellite also travel in straight lines - but they can immediately be re-directed from the satellite back to Earth, greatly extending the range of communications. Instead of a ship sending out a distress alert and hoping that another ship is near enough to hear, satellites enable the message to be sent to a satellite and then back to a dedicated station on land that is designed and equipped to deal with such emergencies.
In 1971, IMO submitted two recommendations to the ITU conference on space telecommunications with respect to operational requirements for a satellite communications system devoted to maritime purposes. They specified, among other things, that maritime satellite communications could be used for the exchange of information by telephony and telegraphy, including data transmissions, direct printing and facsimile. In particular, it was already recognised that satellites offered great advantages in alerting and locating ships in cases of distress or emergency; facilitating search and rescue operations; issuing safety and urgency messages, and a number of other functions such as automatic reporting of ships' positions, position determination, traffic guidance, automatic navigation warnings and weather routeing. In addition, maritime satellite communications promised to be of great use in the operation and administration of ships.New maritime satellite systemIMO decided to start work on the establishment of a new maritime satellite communications system and in 1973, the IMO Assembly adopted two resolutions which were to form the basis of the Organization's future work in this area and led to the adoption of the Convention on the Establishment of the International Maritime Satellite Organization (Inmarsat) in 1976.The Convention entered into force in 1979 and Inmarsat became operational in February 1982, when it took over the system operated by the MARISAT Joint Venture, an American company which had pioneered the use of satellites for merchant shipping.The establishment of Inmarsat as an independent organization marked a great step forward for maritime radiocommunications. For the first time, shipping had a communications system reserved solely for its own use and designed for its own purposes. The Inmarsat system offered advantages which could not be provided by terrestrial radiocommunications.The present Inmarsat system utilizes geostationary satellites, two positioned above the Atlantic Ocean, and one each over the Indian Ocean and the Pacific Ocean. From these four positions, satellites virtually cover the globe as far north and south as 75 degrees. Only the Polar regions, where shipping is infrequent, are excluded.
One of the advantages of the Inmarsat system, from the shipowners' point of view, is the business opportunity it provides. Inmarsat not only provides good quality radiotelephone channels, it also provides a service for telex, facsimile and high‑speed data transmission. Moreover, there is guaranteed privacy of communications between ship and owner ‑ an important point in a commercial operation ‑ whereas terrestrial radio messages can be overheard by anyone with the right receiver. Communications in either direction are simple and in many countries the ship can be contacted by merely dialling the appropriate telephone number. The system also provides for reception of medical advice and assistance, meteorological reports and weather forecasts, navigational reports and warnings and ship position reports.
In 1979, a new distress system policy was adopted by IMO with the following recommendations:
• In order to provide an effective link between the international radiotelegraph distress frequency (500 kHz) and the radiotelephone distress frequency (2,182 kHz) all ships subject to the requirements for radiocommunications under the SOLAS Convention (basically this means cargo ships of 300 gross tonnage and above and all passenger ships) should be fitted with radiotelephone equipment and be required to keep a continuous listening watch on 2,182 kHz. • SOLAS Convention ships should be fitted with a maritime VHF installation and where practicable maintain watch on 156.8 MHz (Channel l6). This would also increase the possibility of distress messages transmitted by small craft equipped only with VHF equipment being received by larger ships. An amendment to the SOLAS Convention requiring VHF to be fitted on all passenger ships and on cargo ships of 300 gross tonnage and upwards and to require those ships to keep a continuous listening watch on Channel 16 entered into force in 1984. • The carriage of emergency position‑ indicating radio beacons (EPIRBs) should be required. Float-free EPIRBs are designed to give an automatic distress signal when a ship sinks suddenly. They are also provided for use in some survival craft for manual operation by survivors.
• A selective calling system should be implemented. This is a system whereby individual ships or groups of ships can be automatically connected with a station that has a message for them and vice‑versa. • Narrow‑band direct printing for the promulgation of navigational and meteorological warnings should be introduced. • Equipment performance should be improved and training should be in compliance with the requirements of the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978 (STCW).These recommendations formed the basis for developing the distress system known as the GMDSS which has been fully implemented since 1 February 1999.