Spearfish: Real-Time Java-Based Underwater Tracking of Large Numbers of Targets

Spearfish is the 100 percent Java underwater tracking component of the U.S. Navy's AUTEC, PMRF and SCORE training, test, and evaluation ranges. It is capable of simultaneously tracking more than 100 targets per second across hundreds of square miles and in water depths far in excess of 1,000 meters, including submarines, torpedoes, naval gunfire, and missile impacts.

This presentation discusses this unique problem space and its inherent challenges in the context of running software that is tracking simulated data. It addresses distributed sensor tracking in the presence of ambiguous data in an uncooperative environment as well as multithreaded performance and correctness over several generations of Java.

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