Context
In confined spaces, the demands of the enviroment can have several effects:

• difficulty moving about and ensuring safe working without support from other workers.
• necessity of protection provided by a third party at the sureface
• need to use breathing apparatus
• requirement for rapid evacuation in the case of an accident
• use of a descent and ascent system that is rapid, flexible, not susceptible to breaking down and does not require an external source of energy

Techniques

• Use of a hauling system that is integrated with the descent system.
• For long descents, use of a separate hauling system.
• Depending on the situation and the user's competencies, techniques developed from caving can be used