De:OsmAnd

OsmAnd ist eine Android-App mit routingfähiger OpenSeaMap-Karte.

Raster-Karte

Menü: Map layers -> Map source -> Define/Edit -> Name: Openseamap
URL:  http://tiles.openseamap.org/seamark/{$z}/{$x}/{$y}.png
-->   Speichern

Dann wähle:
      Map layers -> Map source: "Openseamap" 
und:  Map layers -> Underlay map: "Mapnik" 

[1] is an Android-app with a routable OpenSeaMap chart.

Raster chart

There is a possibility to use OsmAnd with OpenSeaMap-raster-charts:

Menu: Map layers -> Map source -> Define/Edit -> Name: Openseamap
URL:  http://tiles.openseamap.org/seamark/{$z}/{$x}/{$y}.png
-->    Save

Then choose:
      Map layers -> Map source: "Openseamap" 
and:  Map layers -> Underlay map: "Mapnik"