Finland started a move to international symbology in 2003 with the revision of the coastal charts for the Gulf of Finland. Modern INT charts have almost entirely replaced traditional Finnish charts.

The transition to international symbology has meant changes in colours, symbols and the coordinate system. The new symbology has been adopted by the International Hydrographic Organisation (IHO) as an international standard. The national coordinate system KKJ is replaced by WGS 84.

Traditional charts are nevertheless updated until the revision of the whole chart portfolio will be completed.