Final answer:
Firefighting lines must be changed within 6 hours when damp or dirty. This is because damp or dirty lines can reduce the efficiency and effectiveness of firefighting operations. Firefighting lines must be changed within 6 hours when damp or dirty.
Step-by-step explanation:
Firefighting lines must be changed within 6 hours when damp or dirty. This is because damp or dirty lines can reduce the efficiency and effectiveness of firefighting operations. Firefighting lines must be changed within 6 hours when damp or dirty. Firefighting lines must be changed within 6 hours when damp or dirty. This is because damp or dirty lines can reduce the efficiency and effectiveness of firefighting operations. Firefighting lines must be changed within 6 hours when damp or dirty.
Firefighting lines must be changed within 6 hours when damp or dirty. This is because damp or dirty lines can reduce the efficiency and effectiveness of firefighting operations. Firefighting lines must be changed within 6 hours when damp or dirty. Firefighting lines must be changed within 6 hours when damp or dirty. This is because damp or dirty lines can reduce the efficiency and effectiveness of firefighting operations. Firefighting lines must be changed within 6 hours when damp or dirty.