The McMurdo EPIRB HRU Hydrostatic Release Unit is a compact, SOLAS- and IMO-compliant replacement kit designed to keep your EPIRB deploy-ready in demanding marine conditions. This BreaktHRU kit delivers a reliable, automatic float-free release when the beacon is submerged, helping you meet critical safety requirements without compromising space or ease of installation.

What sets this HRU apart is its streamlined design and innovative activation method. Smaller than many other hydrostatic releases, it uses a small pyrotechnic charge to ensure the EPIRB releases automatically from a Category I bracket when submerged at depths of 1.5 to 4 metres (4.9 to 13.1 ft). It’s classified as non-hazardous, simplifying handling and replacement during routine maintenance and regulatory checks.

Key benefits and why it matters

• Regulatory confidence: Fully compliant with the latest SOLAS and IMO resolutions, helping vessel operators meet mandatory life-saving equipment standards.
• Compact, space-efficient design: A smaller footprint than many HRUs, making retrofits and installations easier in confined engine rooms or lifeboat compartments.
• Automatic float-free deployment: The hydrostatic mechanism triggers release, allowing the EPIRB to float free and begin transmitting as soon as it’s in the water.
• Broad compatibility: A complete HRU Replacement Kit for McMurdo E3, G4, Precision, Rescue, E5, and G5 EPIRB models housed in CAT-1 Float Free systems, as well as the KANNAD Safelink 406Mhz EPIRB in CAT-1 Float Free Housing.
• Industry-standard reliability: Engineered to perform under real-world marine conditions, with a design that prioritizes dependable operation over time.

Compatibility and coverage

• Models supported: McMurdo E3, G4, Precision, Rescue, E5, and G5 EPIRBs contained in a CAT-1 Float Free Housing; also compatible with KANNAD Safelink 406Mhz EPIRB in CAT-1 Float Free Housing.
• Activation depth: Releases when submerged in water between 1.5 and 4 metres (4.9–13.1 ft).
• Footprint: Designed to fit the footprint of existing HRUs, simplifying replacements without modifying mounting brackets.

Practical use cases

Ideal for yachts, commercial vessels, and lifeboat operations where SOLAS/IMO compliance and reliable beacon release are essential. Use this HRU kit during routine maintenance, regulatory inspections, or when upgrading aging float-free systems. Its compact size and straightforward replacement process minimize downtime while maintaining mission-critical signaling in emergencies.

What to expect and best practices

• Complete replacement kit: Includes everything needed to upgrade or replace the HRU in the specified McMurdo and KANNAD EPIRB configurations.
• Non-hazardous handling: Classified as non-hazardous, helping to simplify storage and transport ahead of maintenance windows or service cycles.
• Maintenance alignment: As a SOLAS/IMO-compliant component, it should be integrated into regular safety inspections and service routines according to regulatory guidelines.

Choose the McMurdo EPIRB HRU Hydrostatic Release Unit to ensure a compliant, reliable, and space-efficient float-free release for your EPIRB, reinforcing crew safety and search-and-rescue effectiveness when every second counts.