miner's dial

Noun

A compass with sights, used in surveying.

Japanese Meaning

測量に使用される、照準器付きのコンパス

The surveyor set the miner's dial on its tripod and sighted the distant marker to record accurate bearings.

測量士は照準付きコンパスを三脚に取り付け、遠方の標識を照準して正確な方位を記録した。

Sense（1）

A compass with sights, used in surveying.