The Plan Position Indicator System by G. H. Davis
Wall Art and Photo Gifts from Mary Evans Picture Library
The Plan Position Indicator System by G. H. Davis
A diagram showing the system developed as part of British radar sets, first demonstrated in the Thames Estuary. The system gives a picture of obstructions in the vicinity, allowing movement in low-visibility conditions.
1946
Mary Evans Picture Library makes available wonderful images created for people to enjoy over the centuries
Media ID 14125309
© Illustrated London News Ltd/Mary Evans
Conditions Davis Diagram Indicator Movement Navigation Plan Position Radar Shipping System Visibility Obstructions
EDITORS COMMENTS
This diagram represents The Plan Position Indicator System, a groundbreaking innovation developed by G. H. Davis in 1946 as part of British radar technology. The system revolutionized navigation in low-visibility conditions, particularly in the Thames Estuary, where shipping traffic was dense and the foggy weather often posed significant risks. The Plan Position Indicator System, or PPI for short, provided mariners with a real-time picture of obstructions in the vicinity, enabling them to make informed decisions about the movement of their ships. The system worked by emitting radio waves that bounced off nearby objects and returned to the radar set, creating a two-dimensional representation of the surrounding environment. The PPI system was a significant advancement in radar technology, as it allowed for the detection and location of multiple targets simultaneously. This was particularly useful in busy shipping lanes, where the risk of collisions was high. The system also enabled mariners to navigate more effectively in poor visibility conditions, such as fog or heavy rain, which were common in the Thames Estuary. The diagram illustrates the various components of the PPI system, including the radar antenna, the cathode ray tube display, and the various control mechanisms. The system was a crucial tool for ensuring the safety of shipping traffic in the Thames Estuary and other areas with similar navigational challenges. Today, radar technology has advanced significantly, but the principles of the PPI system remain an essential part of maritime navigation.
MADE IN AUSTRALIA
Safe Shipping with 30 Day Money Back Guarantee
FREE PERSONALISATION*
We are proud to offer a range of customisation features including Personalised Captions, Color Filters and Picture Zoom Tools
SECURE PAYMENTS
We happily accept a wide range of payment options so you can pay for the things you need in the way that is most convenient for you
* Options may vary by product and licensing agreement. Zoomed Pictures can be adjusted in the Cart.