JRC JMR-9225-9X - Functions of the ECDIS (Option); Starting and Preparing the ECDIS; Moving the Chart; Zooming In;Out the Chart

2.4 Changing the Observation Range
1 Click the Range Scale button of the presentation and mode information, and then
select a range from the pop-up menu that appears.
A wider range can be observed by widening the observation range.
When the observation range is narrowed down, the area near own ship can be observed by
enlarging it.
Range Scale button
6