Witherbys Software
ASNAv
Free celestial navigation software that calculates position from star or planet observations without a nautical almanac and plots the most probable position.
Description
ASNAv is free celestial navigation software for ship's officers and yachtsmen, developed and built by Witherbys' in-house technical director. It calculates the user's position from observations of stars or planets without the need for a nautical almanac.
Key features
- Position calculation from star or planet observations without a nautical almanac
- Computes lines of position (LOPs)
- Computes and plots the most probable position with an ellipse of probability
- Helps select stars to observe
- Calculates azimuth, rhumb line, Great Circle and ETA
- Free to use
Applications
Celestial navigation practice and backup position fixing for officers and yachtsmen.
More from Witherbys
- Witherbys Passage Planning Guides
- Witherbys Shipping Regulations and Guidance
- Witherbys Maritime Security Publications
- Witherbys Navigation & ECDIS Publications
- Witherbys Witherby Connect
- Witherbys Logbooks and Record Books
- Witherbys Management Plans
- Witherbys Flag State Regulations
- Witherbys LNG Port Info
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