There isn't one single device that specifically finds latitude. Instead, various tools and techniques are used to determine latitude, and they often rely on measuring other celestial or terrestrial references. Here are a few examples:

Traditional Methods:

* Sextant: This instrument measures the angle between a celestial object (like the sun or a star) and the horizon. By using astronomical tables, this angle can be translated into latitude.

* Astrolabe: An older version of the sextant that uses a graduated circle to measure the angle of a star above the horizon.

* Compass and a Timepiece: While a compass only gives direction (North, South, East, West), if you know the precise time and have a reliable timepiece, you can use the sun's position to determine latitude. This was a common method for sailors.

Modern Methods:

* GPS (Global Positioning System): The most common modern method. GPS satellites orbit Earth and transmit signals that are received by GPS receivers (in phones, cars, etc.). The receiver uses the time it takes for the signals to arrive to pinpoint its location, including latitude.

* GNSS (Global Navigation Satellite System): This encompasses various satellite systems like GPS (US), GLONASS (Russia), Galileo (Europe), and BeiDou (China). All these systems can provide latitude.

* Inertial Navigation System (INS): This uses sensors (accelerometers and gyroscopes) to measure motion and orientation. By integrating this data, an INS can calculate latitude without relying on external signals.

* Smartphone Apps: Many smartphone apps use GPS or other location services to determine latitude.

So, while there's no one "device" that solely finds latitude, various tools and technologies rely on different methods and measurements to determine it.