Hout Bay Harbour, Cape Town (Image: Unsplashed)
The surveillance of territorial sea areas holds increasing significance for coastal nations. According to the United Nations Convention on the Law of the Sea (UNCLOS), countries can establish a territorial sea extending up to 12 nautical miles from their coastline and an Exclusive Economic Zone (EEZ) of up to 200 nautical miles. These zones become crucial economic resources for coastal states, entailing responsibilities for administration, law enforcement, environmental protection, and sustainable management. South Africa, as a maritime nation, has its security and economy intricately tied to the safe passage of vessels through its vast EEZ, which ranks among the world's largest. To safeguard this vital maritime domain, the National OCIMS Integrated Vessel Tracking Decision Support Tool (IVT DeST) has been implemented to ensure effective vessel traffic monitoring that intelligently monitor ships and pollution in near-real time to provide this information directly to users.
IVT DeST optimises the utilisation of marine resources by providing real-time insights into vessel movements and activities. This data-driven approach enables informed decision-making, ensuring the sustainable management of South Africa's maritime domain for the benefit of both present and future generations.
By providing comprehensive vessel traffic data, authorities are empowered to identify and proactively protect sensitive marine ecosystems and endangered species. This helps mitigate the negative impacts of human activities on the marine environment, preserving South Africa's rich marine biodiversity.
IVT DeST fosters seamless collaboration among maritime stakeholders, enabling a unified approach to monitoring and enforcing maritime regulations. This bolsters South Africa's ability to combat illegal activities, safeguarding the country's maritime interests and resources.
Remote Sensing Data from Satellites: Synthetic Aperture Radar (SAR) imagery, with its ability to penetrate clouds and operate day or night, provides independent surveillance of vast maritime areas, even in challenging weather conditions. This ensures continuous monitoring of vessel activity, regardless of external factors.
Transponder Data: Automatic Identification System (AIS) signals, broadcast by vessels themselves, offer real-time information on their location, identity, and voyage details.
Vessel Monitoring Systems (VMS): Often used for fisheries management, provide additional tracking capabilities for specific fishing vessels.
The integration of these complementary datasets safeguards against potential gaps or blind spots in either system.
Remote sensing can detect vessels that may not be transmitting AIS signals (known as “Dark Targets”), whether due to intentional non-compliance or system malfunctions.
Conversely, AIS and VMS data can validate and enrich the information gleaned from remote sensing imagery, providing more detailed vessel identification and activity patterns.
IVT DeST integrates and analyses these diverse data streams, generating a unified and comprehensive view of vessel traffic within South Africa’s EEZ.
Advanced algorithms and techniques enable the identification and tracking of vessels, even those attempting to evade detection.
This fusion of multiple datasets provides a more robust and reliable foundation for maritime decision-making, supporting a wide range of applications such as:
o Enforcement of maritime regulations
o Protection of marine habitats and species
o Sustainable governance of ocean resources
o Search and rescue operations
By pinpointing vessels of interest and identifying potential threats, IVT DeST empowers South African authorities to strategically allocate limited resources for enforcement and conservation efforts.
This targeted approach maximises the effectiveness of maritime operations, ensuring timely and efficient responses to emerging challenges.
Department of Forestry, Fisheries and the Environment, Defense Intelligence, South African Navy Hydrographic Office
Council for Scientific and Industrial Research, South African Weather Services, South African Environmental Observation Network, South African Maritime Safety Association, Transnet National Port Authority, Institute for Maritime Technology, South African National Space Agency
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