Confined space: Supervision, resourcing and communication

Control Measure Knowledge

Prior to commencing operations, incident commanders should consider putting in place appropriate supervision and ensure that personnel are competent to work in confined spaces.


The incident commander may decide that a greater degree of supervision is required, based on their risk assessment. They should appoint a confined space supervisor, who has the appropriate level of managerial authority, knowledge, skills and competence to ensure they can effectively manage the required resources as determined by the incident plan.

A confined space supervisor should ensure that:

  • A suitable and sufficient risk assessment process is ongoing and being recorded
  • Appropriate control measures are implemented and maintained
  • Hazards and risks are communicated to all those involved
  • They regularly update the incident commander of the tactical plan, progress and any findings of the risk assessment

A confined space supervisor, where available, can advise incident commanders of the hazards and risks associated with restricted access and egress and with the operational requirements at incidents involving confined spaces.

If the risk assessment requires, it may be necessary to appoint dedicated safety officers to monitor the working environment or specific hazards. Entry control procedures should be used to monitor the safety of personnel if they are committed to work in a confined space environment. Incidents involving confined spaces are more likely to require a greater degree of control and supervision.

Incident commanders should also apply the most appropriate level of breathing apparatus (BA) entry control supervision for a confined space incident. For further information refer to:

Competent personnel

Competent personnel are those with the necessary knowledge, skills, experience of and familiarity with the relevant processes and equipment, which enables them to understand the risks involved and apply the necessary safeguards.

In line with safe person principles, only competent personnel should be deployed in this environment, and only if they have the appropriate equipment, supervision and personal protective equipment (PPE).


An effective communication system must be in place and should enable communication:

  • Between all personnel working inside the confined space
  • Between personnel inside the confined space and those outside
  • To request further resources in case of emergency

Adequate fallback arrangements should be in place in the event communications fail.

The equipment used for communication should take account of the other equipment, PPE and respiratory protective equipment (RPE) that is used when working in confined spaces.

Where there is a risk of explosive atmospheres, all communication equipment used in a confined space must be protected so that it does not present a source of ignition. For further information refer to:

Alternatives to normal communications should be considered, including dedicated urban search and rescue (USAR) capability and existing on-site systems. A leaky feeder system and deploy repeaters should be requested if required and available.

Strategic Actions

Tactical Actions