Some workplace hazards are obvious. A damaged guard, an unstable load or an unprotected edge may be easy to recognise. A hazardous atmosphere can be very different. The air around you may look completely normal while containing too little oxygen, harmful gases or other contaminants.
You cannot rely on your senses to tell you whether an atmosphere is safe. Oxygen deficiency cannot be seen or smelled, some hazardous gases may be difficult to detect, and others can affect your ability to recognise them. By the time you experience symptoms, you may already be in danger.
That’s what makes compressed air breathing apparatus (CABA) different from many forms of PPE. Rather than filtering the surrounding air, CABA provides the wearer with an independent supply of breathable air where the atmosphere cannot be safely relied upon.
CABA is used across a range of higher-risk environments, including some confined space work, wastewater operations, ammonia refrigeration, chemical processing, and emergency or rescue situations where the atmosphere may be unsafe or immediately dangerous to life and health.
Where risk builds
CABA risk often builds through small gaps in the system – equipment that isn’t properly checked, people who aren’t properly prepared, or emergency arrangements that haven’t been tested:
- A set pulled from the store without pre-use inspection, because it “was fine last time”
- Cylinders that haven’t been pressure-tested within their inspection interval
- A mask that hasn’t been fit-tested to the specific worker who’s about to wear it
- A facial hair policy applied inconsistently, so seals aren’t reliable across the team
- Training that focused on donning the set, but not on emergency procedures if something goes wrong at depth
- A rescue plan that assumes the CABA-wearing worker will be able to walk out unaided
The equipment is only as reliable as the process wrapped around it.
Operational use is not rescue
Two different scenarios call for CABA, and they aren’t the same job:
- Operational use. Planned entries into hazardous or oxygen-deficient environments to do routine work. Wastewater maintenance, tank inspections, cleaning inside a chemical processing vessel. The atmosphere is known, the entry is controlled, and the CABA is a planned control.
- Rescue use. Entering an environment to recover a worker who is already in trouble. Time pressure, physical exertion, unknown atmospheric conditions, and often carrying or dragging a casualty. Same equipment, very different demands on the wearer.
Training that prepares a worker for operational use does not automatically prepare them for rescue. The physical and psychological load is different, and the decisions are made under different conditions.
For any workplace that relies on CABA for both, both need to be trained.
Focus areas before the next CABA task
Before the next task requiring breathing apparatus, the people responsible should be clear on:
- Is every worker who might use CABA trained against NZQA US25044, and is that training current?
- Have all sets been pre-use inspected, and are cylinders within their pressure test interval?
- Are masks fit-tested to the specific individuals who wear them?
- Is the facial hair policy clearly documented and consistently applied?
- If CABA is being used for rescue, has the rescue plan been walked and tested, not just written?
- Do the workers on stand-by outside a confined space entry know their role if the CABA-wearing worker gets into trouble?
Training that builds real capability
Besafe Training’s Breathing Apparatus (CABA) course is intensive, hands-on, and built around real workplace scenarios.
Our Breathing Apparatus (CABA) course covers:
- NZQA Unit Standard 25044 (Level 3, 4 credits), delivered in one full day
- Safe operation of CABA in accordance with physiological and legal requirements
- Preparing, testing, recommissioning, and documenting CABA equipment and systems
- Wearing, donning, doffing, and monitoring CABA in potentially IDLH (Immediately Dangerous to Life or Health) environments
- Emergency procedures for entrapment, loss of direction, or injury during CABA use
The course is delivered in-person at our Wiri or Albany training centres, or at your workplace by arrangement, with a maximum of eight participants per session to ensure genuine hands-on experience.
CABA training pairs directly with our Confined Space Entry course (NZQA US17599, US18426, US25510) for teams whose CABA use is confined space entry work.
Note: participants need to be clean-shaven for mask seal, and moderate physical fitness is required for the practical assessment.
👉 View course details and book now: Breathing Apparatus (CABA) training
