The key to learning celestial navigation is practice, but how can you practice without a natural water horizon? The time-honored solution is an artificial horizon made from a tray of fluid water, oil, even mercury. This simple device from Davis uses water to reflect sun through shades to permit accurate sights. Includes two sun shades, lid and directions.
The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.