Submarine sonar systems are advancing in capability due to the developments in sensor technology and the application of modern algorithms. Measuring performance of a modern sonar system at sea is a complex problem that requires a multi-disciplined approach to ensure the aims of a trial are achieved. The underwater acoustic environment is complex and it is rare to experience conditions that support every aim of any trial. Decisions made through system development will impact the ability for a system to achieve successful sell-off via sea trial; the possibility for calibration and an ongoing measurement-based maintenance program. This system-of-systems plays a pivotal role supporting the evaluation and transition-to-use of on-board systems, primarily through the conduct of at-sea trial activities. This support encompasses all phases of test including pre-trial planning, trial data collection and monitoring and post-trial data analysis. The monitoring of trials conduct and data collection must make efficient use of trials staff and post-analysis must support required turn-around times to allow for trials windows to be used effectively. This paper considers the requirements on the systems supporting successful evaluation of sonar performance, particularly in a sea trials environment. The support systems described include physical items such as transducers, software systems used during a trial and systems engineering techniques that ensure stated requirements can be demonstrated in a wide variety of at-sea conditions. These same systems are also key enablers for continuous improvement via access to real-world recordings, and the introduction of machine learning algorithms.
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