Satellite navigation
A satellite navigation system or satnav system is a system of satellites that provide autonomous geo-spatial positioning with global coverage.
It allows small electronic receivers to determine their location (longitude, latitude, and altitude) to high precision (within a few metres) using time signals transmitted along a line of sight by radio from satellites.
The signals also allow the electronic receivers to calculate the current local time to high precision, which allows time synchronisation. A satellite navigation system with global coverage may be termed a Global Navigation Satellite System (GNSS).
TomTom
Displayed here is a TomTom Go 610 Global Positioning System (GPS) navigation device. TomTom NV is a Dutch company, founded in 1991, that produces navigation and mapping products.
The TomTom Go product is an all-in-one GPS navigation device with a touch screen, speaker, USB port, and internal lithium-ion battery. Most models have Bluetooth transceivers that allow connection to a smartphone which allows it to make and receive calls.
We’re upgrading our systems, and this includes changes to our customer and member account log in, MyIET. It’s part of our big picture plan to deliver a great experience for you and our wider engineering community.
Whilst most of our websites remain available for browsing, it will not be possible to log in to purchase products or access services from Thursday, 17 April to Wednesday, 30 April 2025. Our Member Relations team is here to help and for many of our services, including processing payments or orders, we’ll be able to support you over the phone on +44 (0)1438 765678 or email via membership@theiet.org.
We apologise for any inconvenience this may cause and thank you for your understanding.
For further information related to specific products and services, please visit our FAQs webpage.