Confirm every worker is out
before CO₂ is released.
Real-time digital mustering for engine rooms, machinery spaces and CO₂-protected zones - automatically verifying every worker has evacuated before fire suppression is activated.
CO₂ flooding is lethal to anyone still present. Manual headcounts cannot guarantee accuracy under emergency conditions. Real-time indoor location makes evacuation verification automatic.
Manual mustering cannot keep pace with the stakes.
In engine rooms and machinery spaces, CO₂ fire suppression systems are designed to extinguish fires rapidly - but they are lethal to any person still inside. Verifying that every worker has evacuated before activation is a safety-critical requirement that manual processes cannot reliably fulfill under emergency conditions.
Manual headcounts are too slow
In an emergency, radio-based roll calls and paper lists take too long - and a missed name or unclear response can delay CO₂ activation when every second matters.
No visibility of who is still inside
Without real-time location data, it is impossible to know which specific zones still contain personnel - making targeted rescue decisions dangerous and uncertain.
Regulatory exposure without audit trail
IMO, SOLAS and industrial safety regulations require documented mustering procedures. Manual logs are error-prone and cannot provide the timestamped, verifiable record that inspectors require.
Verify every person is out - automatically, in real time.
NAO® Track provides real-time personnel location and automatic headcount inside CO₂-protected zones. Workers wear BLE-enabled badges. The moment an alert is triggered, the system knows exactly who is inside, where they are and whether the zone is clear - without a single radio call.
CO₂ mustering is the safety-critical procedure of verifying that every person has evacuated a protected zone before the fire suppression system is activated. Real-time indoor location makes this verification automatic, continuous and auditable.
From alert to confirmed-clear - in seconds.
Five steps that transform the CO₂ mustering procedure from a manual radio roll-call into a real-time, automatic and auditable safety process.
Equip workers with BLE badges
Personnel entering engine rooms and CO₂-protected zones wear NAO® Badge Tags - compact BLE devices that continuously broadcast their identity and position signal to the ship or facility's existing BLE infrastructure.
Existing Cisco · Aruba · Fortinet APsAlert triggered - headcount starts instantly
When an emergency occurs, the worker presses the badge button or the system receives an external alarm. NAO® Track automatically identifies and counts every person present in each zone at that exact moment - no radio call, no manual list.
Badge button · External alarm integrationEvacuation monitored in real time
The CO₂ mustering dashboard shows the live position of every worker still inside, their evacuation progress and which zones remain occupied. Safety officers see who is out, who is not and where each person is - continuously updated.
Live zone-by-zone dashboardZone confirmed clear
When all personnel have evacuated, the system confirms the zone status as clear - providing safety officers with the verifiable confirmation needed to authorize CO₂ activation with full confidence.
Electronic muster confirmationTimestamped audit trail generated
Every event - who was present, when they left, which zones cleared and when - is automatically logged with timestamps. The record is immediately available for incident reports, regulatory inspections and SOLAS compliance documentation.
IMO · SOLAS · ISM compliant logging
One mustering platform. Every high-risk environment.
From engine rooms on cruise ships to machinery spaces on offshore platforms - wherever CO₂ suppression systems protect critical infrastructure, NAO® Track delivers real-time electronic mustering.
Cruise ship mustering
Track personnel across engine rooms, CO₂ zones and technical compartments on board - on existing Cisco BLE infrastructure and fully isolated from internet connectivity.
Maritime · IMO · SOLASOffshore mustering
Electronic mustering for offshore platforms, FPSOs and drilling rigs - verifying headcount across hazardous zones with no connectivity dependence.
Oil & gas · OffshoreEngine room mustering
Real-time visibility of every technician working in CO₂-protected engine rooms - automatic evacuation confirmation before suppression activation.
Marine engineeringIndustrial mustering
Factories, chemical plants and critical infrastructure facilities with CO₂-protected zones - the same real-time digital mustering process, adapted for industrial environments.
Industrial safetyEmergency headcount drills
Run digital mustering drills without radio calls or manual lists. Every drill is recorded, timed and logged - providing verifiable evidence for flag state and port state inspections.
ISM · PSC inspection readyMachinery space mustering
Machinery spaces and pump rooms where CO₂ protection applies - personnel tracking and zone-confirmed-clear status provided automatically at the moment of alert.
Machinery · Pump roomsEvery second saved. Every worker accounted for.
Headcount delay
Automatic personnel count at the moment of alert - no radio call, no waiting for responses.
Zone visibility
Every CO₂-protected zone monitored simultaneously - no blind spots, no unconfirmed areas.
Evacuation tracking
Real-time location of every worker still inside - updated continuously as they move toward exits.
Audit trail
Timestamped event log generated automatically - inspection-ready without any manual documentation.
Reduced CO₂ activation risk
Activation is authorized only when the system confirms every zone is clear - removing the risk of premature or uninformed triggering.
IMO and SOLAS compliance support
Verifiable, timestamped mustering records that satisfy flag state, port state and insurance auditor requirements.
Faster drill completion
Digital drills complete faster, are fully logged and require no manual reconciliation - demonstrating continuous safety improvement.
No connectivity dependency
The entire system runs on-premise, on the vessel's or facility's closed network - zero reliance on internet or satellite connectivity.
On-premise. Closed network. No internet required.
NAO® CO₂ mustering runs entirely on the vessel's or facility's existing BLE infrastructure - access points already installed on board. No new network, no satellite dependency, no cloud connection required during an emergency.
Fully on-premise architecture. All location data, headcount logic and mustering dashboards are processed and stored locally - meeting maritime data sovereignty and security requirements without compromise.
CO₂ mustering across an entire cruise fleet - Carnival Maritime
Pole Star deployed digital CO₂ mustering across the Carnival Maritime fleet, covering engine rooms and CO₂-protected zones on 11 ships - fully on-premise on existing Cisco BLE infrastructure.
Electronic mustering on 11 ships - engine rooms, CO₂ zones and technical compartments
Carnival Maritime deployed NAO® Track to replace manual CO₂ mustering procedures across its fleet. Crew operating in engine rooms and CO₂-protected zones wear BLE badge tags. When an alert is triggered, NAO® Track automatically locates every person present, monitors evacuation progress zone by zone and confirms when each space is clear - all on the ship's existing Cisco BLE network, with zero internet dependency.
Everything you need to know about CO₂ mustering.
What is CO₂ mustering?
CO₂ mustering is the safety-critical procedure of verifying that every person has evacuated a CO₂-protected zone before the fire suppression system is activated. Because CO₂ displaces oxygen and is lethal to anyone still present, confirming a complete evacuation is a mandatory step before activation - whether on a cruise ship, offshore platform or industrial facility.
How does digital mustering differ from manual headcount?
Manual mustering relies on radio roll-calls, paper lists and human confirmation - all of which take time and introduce error under emergency conditions. Digital mustering using real-time indoor positioning automatically identifies who is in each zone the moment an alarm is triggered, tracks their evacuation continuously and confirms zone-clear status without any manual intervention.
Which environments is the NAO® CO₂ mustering system designed for?
NAO® Track is designed for engine rooms, machinery spaces, pump rooms and other CO₂-protected technical zones on cruise ships, ferries, offshore platforms and industrial facilities. The system runs entirely on-premise and requires no internet or satellite connectivity.
Does the system require new hardware or a new network?
No. NAO® CO₂ mustering is designed to run on the vessel's existing BLE-capable access points from Cisco, HPE Aruba or Fortinet - infrastructure that is typically already installed on board. Workers wear BLE badge tags; no additional fixed infrastructure is required.
Is mustering data stored in the cloud?
No. All mustering data, headcount logic and evacuation dashboards run entirely on-premise on the vessel's closed network. There is no dependency on cloud services, internet connectivity or satellite links - which is essential for emergency reliability and maritime data sovereignty compliance.
Does the system support SOLAS and IMO mustering requirements?
Yes. NAO® Track generates a timestamped, verifiable log of every mustering event - who was present, when they evacuated and when each zone was confirmed clear. This documentation supports SOLAS compliance, ISM audits, flag state inspections and port state control reviews. See also: worker safety solutions.
Can the system be deployed across an entire fleet?
Yes. The NAO® platform scales from a single vessel to an entire fleet - using the same software, badge hardware and audit standard across every deployment. Carnival Maritime deployed the system across 11 ships with 38 CO₂ zones and 153 emergency badges.
What happens if a worker's badge is not detected?
The system flags undetected badges as an outstanding alert - immediately notifying safety officers that not all personnel are confirmed out. This ensures that the absence of a signal triggers an escalation, not a false all-clear.
How long does deployment take on a vessel?
Deployment timelines depend on vessel size, number of zones and existing BLE infrastructure. Pole Star works with operators during port calls to commission the system with minimal disruption. Contact us for a vessel-specific assessment.