Mark Tozer, PhD

Handrails When folk first start navigating, they use handrail features all the time. Handrails are linear features such as paths, fences o...

All existence moves in waves - heat waves, sound waves, light waves, waves of nausea, joy, relief; shock waves, radio waves - but there is o...

Considering their importance in navigation, grid references are comparatively simple. First of all, what are they? Grid references are a nu...