針頭軸承
指南針軸心查詢器.
課程應該不止一個數字。
N045°
16-point bearingNortheast
Each point spans about 22.5°. Real navigation must also account for variation, deviation, wind and current.
針頭軸承
課程應該不止一個數字。
Each point spans about 22.5°. Real navigation must also account for variation, deviation, wind and current.