Hi.
I wish to share "difficulties".

The big problem consists in drawing of "grid" and "numbering" on shoal, in a considerable quantity of borders of "colour" Gradient. I do not wish to overload a navigation map. I go on a difficult way. Visibility of "grid" and "numbering" (on shoal) "does not hurt the eyes" but it is possible to read.
The navigating map -
is primary,
MQK -
is secondary.
I think correctly?