The term "widowmaker" for timber that is neither standing nor fallen to the ground demonstrates another emphasis on situational awareness as a safety principle.

This occupational safety principle originates from the Lagerlunda train crash of 1875 in Sweden.

In fact, abstinence-only education goes out of its way to reinforce to students that they are not able to demonstrate self-management skills and apply safety principles.

The tests proved key safety principles of the design of modern nuclear power reactors.

"We believe a lot of basic safety principles are being compromised to maximise the revenue," Linington said.

The same basic safety principles apply.

The trimming department is controlled by operational inspectors to ensure that the company has met the safety principles and procedures.

Firstly, he argued that peasants were "risk averse", or, put differently, followed a "safety first" principle.

It has turned out that many platforms in the North Sea have been operating in breach of basic safety principles.

The modernization and completion programme planned by the operators will never satisfy Western safety principles.