Sightloom: Celestial Nav is a focused, fully on-device app. A complete offline celestial-navigation workbench for sextant correction, almanac interpolation, sight reduction, running fixes, intercept plots, and voyage logs.
KEY FEATURES
- Observed-to-apparent altitude correction ledger
- Computed altitude, azimuth and intercept
- Two- and three-sight running-fix workspace
- Offline almanac interpolation examples
- Voyage log and PDF handoff
- Editable complete sample and local project persistence
- CSV input plus local PDF and data export
- Fifty-two original offline reference plates
ONE-TIME AND PRIVATE
- One paid download; no subscription or in-app purchase
- No account, advertising, analytics, tracking, or developer-operated backend
- Core features and bundled content work offline
- Work remains on device unless you deliberately share or export it through an Apple system interface
Training and cross-checking aid only. Maintain an approved almanac, tables, chronometer practice and primary navigation system.
