Spyglass

The is a tool in Salt that works by zooming the players view times 5 and adds a Telescopic View.

This tool helps the player to see more details of far away items, enemies and islands without the need of getting close to get a proper view, endangering the player and/or without having to use more time to get close enough.

Source

 * Looted from a dead Captains Navigator
 * Pirate Elite Navigators

Trivia

 * The Spyglass is the only item in the game that adds a zoom factor to the players view.