pendulum clinometer
1suunto clinometer® — A small, handheld pendulum clinometer commonly used in cave survey [25] …
2Inclinometer — Compass with inclinometer Military model An inclino …
3Archaeoastronomy — (also spelled archeoastronomy) is the study of how peoples in the past have understood the phenomena in the sky, how they used phenomena in the sky and what role the sky played in their cultures. [Sinclair 2006:13] Clive Ruggles argues it… …