The pre‑calibrated Global Acoustic Positioning System (GAPS) combines USBL, INS and GPS technologies, delivering the most accurate USBL performance in its category. It operates reliably in both deep and extremely shallow water, as well as in challenging environments where other systems often fail. Exail's (iXblue) fourth‑generation pre‑calibrated GAPS integrates a high‑performance ultra‑short baseline (USBL) system with a fiber‑optic inertial navigation system (INS) in a single housing, providing precise positioning of subsea assets across diverse and demanding conditions. Typical applications include towfish tracking, AUVs, ROVs, other subsea vehicles, and diver tracking.
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