MapRun is a free Orienteering App that can be used to replace SI sticks. It runs on your phone and can also be sent to Garmin watches for use at events. Your device will alert you when it has picked up the control and you can move onto to the next one. The Marlborough Orienteering Club will be using this system for some of the future events and training courses. Below are links and information about the App:
To get started, including a link to download the App and a video that explains how it works click here
Details regarding phone settings can be found here
Details for setting up on your Garmin watch can be found here