A SERVICE OF

logo

Open as PDF
next previous
6. ECDIS Overview
6-18
6.2.6 How to verify datum
Datum is used to select between different models of the earth. It is essential that you use datum in a uniform way.
If you use paper charts together with electronic chart material, it is recommended that you use the same datum as
your current paper chart to avoid misalignment between your electronic chart system and points taken or plotted on
your current paper chart.
Once you have selected a datum, all numerical latitude-longitude
position values are presented in your selected datum.
To change the datum:
1. Select the datum indication in the top box in the information area.
2. Spin the scrollwheel to select appropriate datum, the one that
matches your paper charts, then push the scrollwheel.