You might also be interested in....

Space and time on Earth are regulated by the prime (Greenwich) meridian, 0'. Before the 1880s more than 25 prime meridians were in use, resulting in problems of global measurement that engaged geographers, astronomers and navigators.

Dealing with incidents

A step by step framework for dealing with incidents and accidents in the field

Dealing with incidents

A step by step framework for dealing with incidents and accidents in the field