It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Barry is a private pilot and often used the Wallan airfield which is a 3,000ft grass strip typical of many private airfields around Australia and the World. Wallan airfield was impossible to find in the dark, (it’s difficult enough in daylight) and with no easy access to power it was too expensive to install a traditional electric ground guidance system. Puzzling over this problem Barry came up with the VSL beacon and marker system. He soon realised that the same principles could be applied to marine and highway applications. Barry has also invented the glow-seat which is a toilet seat that not only glows in the dark but also kills bacteria!