The same 21 hazards as one continuous surface instead of 21 fixed frames. Satellite basemap, OpenSeaMap seamarks, hazards and tracks on top. Click any marker.

Hazards

corroborated — thick ring
single source
unverified — thin, faint
amber core = conditional on tide or swell

Tracks

local practice — the route that works
the route that grounded — it stops at the rock
transit — two marks in line, stay one side

Prototype. Not a chart. Basemap imagery © Esri and its providers; seamarks © OpenSeaMap/OSM contributors (ODbL). Hazards compiled from published prose in Greek, Spanish, French and Basque.

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