OSI Maritime Systems has successfully completed the final harbour acceptance test (HAT) for its tactical dived navigation systems (TDNS) on four submarines operated by the Chilean Navy.
The upgrade involved the delivery of four TDNS units. The first system was installed on a Thomson-class submarine in 2022, followed by a second vessel of the same class in 2023.
The remaining two systems were delivered to Scorpène-class submarines later that same year.
OSI also provided training to submarine crews in system operation and maintenance.
The HAT is said to be a critical step in the certification process for vessel readiness, with the Sea Acceptance Test (SAT) as the final stage.
OSI Maritime Systems president and CEO Jim Girard said: “This milestone highlights the strength of our collaboration with the Armada de Chile and our ability to tailor advanced systems to specific operational needs.
“The delivery and integration of TDNS across their submarine fleet is a testament to OSI’s technical expertise and trusted solutions.”
OSI’s TDNS is powered by electronic chart precise integrated navigation system (ECPINS) software, a warship electronic chart display information system (WECDIS).
ECPINS is claimed to be the only WECDIS third-party type-approved against Nato WECDIS STANAG 4564.
The TDNS incorporates several navigation features designed for operations in environments without access to global navigation satellite systems.
These features include bottom contour navigation, multi-sensor data integration, and an algorithm that calculates a Pool of Errors.
By reducing the need for external sensors, the technology enables submarines to maintain stealth while preserving tactical capability.
The system also enhances situational awareness and operational performance through various ECPINS tools. These include a 3D navigation view, water space management, moving havens, target motion analysis, and subnotes.
OSI collaborated with the Chilean Navy to tailor the system to specific requirements. Key elements included improved sensor identification and mast management, which contribute to faster operator response and heightened awareness.
A customised submarine interface was also developed to deliver navigation information clearly and efficiently.
OSI Maritime Systems Business Development vice-president Jim Davison said: “The successful completion of the HAT with the Chilean Navy underscores OSI’s commitment to delivering cutting-edge navigation capabilities.
“TDNS reflects the future of undersea operations, providing unmatched tactical advantages in GNSS-denied environments.”
