Lung cancer is the most common cause of clubbing. Clubbing often occurs in heart and lung diseases that reduce the amount of oxygen in the blood. These may include: 1  Heart defects that are present at birth (congenital).
What is a safety management system (SMS)? A safety management system is a systematic approach to managing safety, including organisational structures, accountabilities, policies and procedures.
ICAO Definition Of SMS. Safety management system is defined as a competent approach to safety. It is a system that deals with safety characteristics throughout an organization. The system offers a systematic way of categorizing hazards and managing risks pledging that these controls are effectual.