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In an emergency, knowing where changes everything.

MHSA regulation 16.7 requires that no person goes underground without an intrinsically safe device capable of determining their last known location if they go missing. addanode delivers person location that closes the gap between "paper certainty" (who signed in) and location certainty (where they actually are) — so rescue teams narrow the search instead of combing kilometres of workings.

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What we deliver

Tags, readers and a control room that's ready.

Intrinsically safe tags

Personal tags — often built into the cap-lamp — certified for the atmosphere they go into. Intrinsic safety is a gate, not a feature.

Reader network

Readers at shaft stations, intersections, travelways and working places build last-known-location, with coverage matched to the risk of each area.

Control-room view

Who's underground and where they were last seen, with an instant per-person query for emergencies — plus headcount and evacuation records.

How we scope it

Coverage matched to risk, on a backbone that survives outages.

  • Confirm intrinsic-safety certification for your specific environment first — everything else is moot without it.
  • Match coverage to risk — zone-level last-known-location meets the core duty; denser reader placement where the risk is highest.
  • Plan the communications backbone — leaky feeder, fibre or mesh suited to your workings; person location depends on it.
  • Make the control-room view emergency-ready — an instant, unambiguous "where was this person last seen," not a report exported later.
  • Integrate and maintain — on the addaNet platform, sharing the backbone with collision prevention and occupational hygiene; with tag, charging and reader upkeep planned in.

Regulatory references are for orientation; confirm current requirements against the latest Mine Health and Safety Regulations and your appointed advisers.

Frequently asked

Person-location questions.

For the full regulatory background, see our MHSA 16.7 guide.

A tag board confirms a person is somewhere underground — "paper certainty." Person location tells you where they were last seen, so in a fire, fall of ground or inrush, rescue teams narrow the search area instead of combing kilometres of workings.
Many underground environments carry explosive-atmosphere risk, so any device a person carries must be incapable of releasing enough energy to ignite a flammable atmosphere. Certification appropriate to your environment is a non-negotiable gate — consumer devices can't go underground.
The core duty is satisfied by reliable last-known-location at zone level, achieved with readers at strategic points. Denser placement gives tighter resolution where the risk is highest — match coverage to the risk profile rather than over-engineering everywhere.

Closing the 16.7 gap?

Tell us about your workings and existing underground comms. We'll help you specify an intrinsically safe person-location system with coverage matched to your risk — and a control-room view that's ready when it matters most.

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