The Great Tide

The Great Tide

has profound effects on the coastal people of the world. They must build structures that allow them access to the sea when it is a quarter mile distant, and when it is roaring on the rocks very near.

This means, very long floating docks and movable quays.

Specifics:
The tide changes completely every 5 years. That means it is low tide every 10th year.
The tide height change varies from place to place, but averages 20 feet.
Many harbors experience the tide moving up to a quarter mile from high to low tide.

Commerce:
As the tide changes, so does commerce along the coast.
During low tide shipping is more difficult with shallow shoals and exposed rocks and reefs. Many boats are dry docked during these years, and the fishermen turn to shell fish pulled from the rocks and mud beds. Trade is conducted along land routes, and interior towns increase in importance and wealth.

During high tide, the opposite is true. Sea trade takes over and fishing is offshore with nets and lines from boats.

The Great Tide

The Broken Gods surfdragon