ACR 9490.1 Hydro Release is a precision-built, water-activated release unit designed to safeguard EPIRB deployment. When submerged in water between 5 and 13 feet (1.5–4 m), the HydroFix mechanism disengages the release rod, enabling the Category 1 bracket to free the EPIRB quickly and reliably.
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HydroFix battery-free release: patent-pending water-activated release rod system that operates independently of power sources or blades for a safer, simpler emergency release.
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Water-activation depth window: activates precisely within 5–13 ft (1.5–4 m) to ensure timely EPIRB deployment.
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Individually tested: each HRU is tested to the highest standards, reflecting ACR’s 50 years of quality craftsmanship and reliability.
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Standard replacement kit compatibility: part of the standard replacement kit for multiple EPIRB models and brackets, ensuring easy maintenance and compatibility (see model list below).
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Wide system compatibility: designed to work with Satellite 406, Satellite2 406, RapidFix 406, GlobalFix 406, Sea Shelter, and Sea Shelter2 systems; not for use with RLB-23 406 EPIRB fully enclosed bracket (P/N 9435/9455).
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Model-specific compatibility: HydroFix unit is part of the standard replacement kit for Satellite 406 (Closed and Open Face Brackets) Model: RLB-27 P/N 2754/2756/2772; Satellite2 406 Model: RLB-32 P/N 2774; RapidFix 406 Model: RLB-33 P/N 2776; GlobalFix 406 Model: RLB-35 P/N 2742; Sea Shelter P/N 9327; Sea Shelter2.
By providing a battery-free, water-activated release, the Hydro Release reduces maintenance needs and eliminates reliance on power sources in the moment of deployment. It ensures the release engages within the correct depth window to promote timely EPIRB activation, while each unit’s individual testing reinforces reliability drawn from decades of ACR craftsmanship. Including it in standard replacement kits across multiple EPIRB models and brackets simplifies maintenance, making compatibility and inventory management easier for marine operators and owners.
