In combination with a sound Safety Management System (SMS), the absence of an accident is sometimes used as a means to describe an organisation’s operation as “safe”. Is this really a valid argument? Do all organisations have a true picture of their safety landscape and have they been able to identify any close calls? Often it is the manifestation of a number of unknown and unrelated events that can result in a serious incident or accident. These events are usually an element of “business as usual” and occur every day as part of the normal operation.