GPS Selective Availability Lifted 10 Years Ago

On 2nd May we reached the 10 year anniversary of the removal of SA from the NAVSTAR GPS system. For those of you not familiar with SA or Selective Availability it was the switching off of this option that made possible the explosive growth we have seen in automotive and personal GPS devices. For those that are interested, the image is of an early Rockwell military GPS unit. As I have seen commented elsewhere, this was described as “handheld”, but you wouldn’t want to hold one for too long!

Find out more. Read GPS Selective Availability Lifted 10 Years Ago at

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Chris Mason

General Manager at Prosig
Chris' passion for software, technology and innovation began in his teens with a diet of Sinclair ZX80's, Commodore Pets and early Apple products. Chris graduated from Portsmouth Polytechnic in 1983 and went on to have a career in software product development, software team management, web development, marketing and, now, general management. His other passions include bicycles, IoT, coffee, running, walking, cooking and supercharged Jags.

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