Poor standards of maintenance are a major cause of occupational accidents and diseases. Many accidents happen during maintenance work, because of a lack of maintenance or as a result of poor quality maintenance. This film shows Napo in a variety of situations, as a maintenance worker or as an employee. In scene 6 — 'Danger within!' — we see the problems of working in confined spaces, in this case during tank cleaning. This film, which is suitable for all sectors and all levels of employees, seeks to promote good practice and draws attention to the importance of safe maintenance.