A seascout is a person, often a young one, who learns about boats and the sea.
Seascouts are often seen as adventurous and brave.
Examples:
The seascout learns to tie knots.
I want to be a seascout when I grow up.
The seascout helps the captain on the boat.
The seascout is the bravest person I know.
The seascout can swim in the biggest waves.
The seascout saves the day when the boat is in trouble.