1
Observation before opinion
Every course correction begins with a measured altitude, not a hopeful heading.
Angles Made Certain
2
Precision earned slowly
Minutes of arc are checked against tables, temperature, and a steady hand.
3
Redundancy keeps the vessel
Sun sight, lunar distance, and dead reckoning agree before the log is inked.
4
The instrument remembers
Brass, glass, and velvet preserve a standard that outlasts the passage.