Blog
Sea and shores
The water your route sails through: keeping off the land, the current that carries you, and the depth under the keel.
Latest article
Keeping off the shallows
A coastline says where the land is, not where the water runs thin: routes now keep to water as deep as you choose, on GEBCO and EMODnet.
Read the articleJuly 2026
Sailing with the current
A knot of current gives or takes a mile every hour: routes now sail in the current of Copernicus SMOC, tide included, or of NOAA's RTOFS.
Keeping off the land, to about ten metres
A coarse coastline closes channels and forgets islets: routes now keep off OpenStreetMap's coastline of the whole world, to about ten metres.