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Developed and maintained by the NFCC

Entrapped procedure

The aim of the entrapped procedure is to maximise the duration of available air in BA sets where BA wearers are trapped or unable to withdraw from the risk area. See entrapped procedure.

Partial breathing apparatus set removal for self-rescue

Partial breathing apparatus set removal is an additional technique for self-rescue available to BA wearers in extreme circumstances where no safe means of egress from the risk area is available or where adopting entrapped procedure presents an intolerable risk to the safety of the BA team.

In those rare circumstances where a BA wearer has become trapped and the dangers are too great to await rescue, partial BA set removal may be deemed the only technique available.

Operational practice

Before commencing partial BA set removal to negotiate any obstruction or restriction on egress from a risk area, the BA team leader should seek further guidance, additional instructions and details of other actions being undertaken from the BA entry control point. The BA team leader should also investigate the availability of any safe alternative exit routes and consider adopting the entrapped procedure.

Partial BA set removal is a technique available to BA wearers for self-rescue in extreme circumstances, where:

  • Egress is through a restricted opening and no other safe means of egress is available
  • Adopting entrapped procedures presents an intolerable risk to the safety of the BA team
  • The technique is carried out systematically under supervision and with assistance from other BA wearers

The BA team leader should consider the physiological and psychological effects of the environment and the increased air consumption of wearers during partial BA set removal. Frequent gauge checks must be undertaken and, where possible, communicated to the BA entry control point.

In addition to duties outlined in BA operational procedures – all incidents, the following responsibilities apply:

Role and responsibilities of the BA team leader

The BA team leader should:

  • Consider the physiological and psychological effects of the environment and the increased air consumption of wearers during partial BA set removal
  • Carry out frequent gauge checks and communicate with the BA entry control operative
  • Consider the availability of safe alternative exit routes and adopting entrapped procedure
  • Ask the BA entry control operative for further guidance and details of other actions being undertaken from the BA entry control point

Role and responsibilities of the BA wearer

The BA wearer should:

  • Ask the BA team leader for further guidance and details of other actions being undertaken from the BA entry control point

For further information regarding emergency arrangements see: Incident command guidance - Ineffective organisation of the incident ground