Navigation
Light on the horizon — sight distance to the lighthouse
Distance from trigonometric height and horizon — for approach and bearing. Offline on the bridge.
Bearing and approach
"Light on the horizon" or above it decides safe distance. Mental math is error-prone in a seaway.
Calculator in NauticCalc
- ·Distance from light height and eye height
- ·Support for "below" or "above" the horizon
- ·Usable offline
- ·Clear for training and coastal sailing
- ·Part of the navigation tools
Offline on board
Pure geometry — no internet needed.
Aid to navigation
Official charts and light lists take precedence.
Frequently asked questions
Light height from chart or lists; eye height typically bridge eye — both adjustable.
Related topics
Horizon understood
Offline
