This is a QGIS plugin to create an equidistant line to determine maritime boundary based on equidistance principle.
Watch the plugin in action here
Visit the tutorial on how to use the plugin in http://ivanbusthomi.github.io/plugins/eqdistant/
Watch the plugin in action here
Visit the tutorial on how to use the plugin in http://ivanbusthomi.github.io/plugins/eqdistant/