WW1 German January 1918 dated postcard

A very nice WW1 German postcard a drawn sailor with lots of going on in the background.
Further more the text (translated as good as possible) “For defence of the German homeland, faith full standing on guard on the east sea beach. We don’t move or leave. We the sailors artillery”

On the back the card is written.
Hard to read and translate, because it is written in old style German.

Card is posted in France or Belgium.
Card is dated with the date stamp 22th January 1918.