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.
A Safety Management System (SMS) is a systematic approach to managing safety, including the necessary organizational structures, accountabilities, policies and procedures. As per ICAO requirements, service providers are responsible for establishing an SMS, which is accepted and overseen by their State.