artificial horizon

Inspired by a child's spinning top toy, Serson wondered if he could create an artificial horizon - something that would stay level, even as a ship lurched and swayed around it.

The entire zone which defined the landscape of my life was now bounded by a continuous artificial horizon, formed by the raised parapets and embankments of the motorways and their access roads and interchanges.

The artificial horizon was then set up, and the flags and banners displayed, these fluttering out bravely before a S.W. wind, which latter, however, was decidedly cold and unpleasant.

At sea, I would use the natural horizon, but that is impossible here amongst the ice and snow, and so I use an artificial horizon made of a pan of mercury.

The sextant and artificial horizon, lying on the ground, escaped destruction, and the dipping-needle had fortunately been taken on board.