The taffrails are the low walls or rails at the back of a ship.
Taffrails help keep people safe on a ship.
Examples:
The sailor leaned against the taffrails and looked out at the sea.
The children sat on the taffrails and dangled their feet over the edge.
The captain stood by the taffrails and steered the ship.
The seagull perched on the taffrails and watched the sailors work.
The taffrails are like a little fence at the back of the ship.
The taffrails are where you can see the big waves and the sky.