tideway; sea route
Refers to a route or channel followed by tidal currents or used by ships at sea. Often appears in literary or nautical contexts.
The ship advances along the tideway.
The old nautical chart shows the sea routes.
long sea voyage
distant seas; far-off sea routes
Compound of 潮 (しお, 'tide') and 路 (じ, 'route'). The reading じ for 路 is a common rendaku form.