A Comparison of Simulated Parallax and Single-Station Range Aids to Navigation
COAST GUARD RESEARCH AND DEVELOPMENT CENTER GROTON CT
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An appropriately designed parallax two-station range allows a mariner to accurately determine a range line--the correct path to steer his vessel--at greater distances. Less expensive alternatives to parallax ranges are desirable, and many ideas, principally single-station ranges, have been proposed. However, the mariners abilities to establish range lines with them have not been measured. The present work has quantified the navigational sensitivity afforded by parallax ranges and three different types of single- station range display systems. The single-station ranges used a temporal characteristics, b spatial representation, or c color changes of the signal to represent changes in lateral position. Range systems were simulated either opto-mechanically or on a high resolution computer display system. The mariners ability to determine both lateral position in a channel and direction of motion across a channel was assessed psychophysically for each range system.
- Underwater and Marine Navigation and Guidance