About seconds
A degree is divided into 60 minutes, and each minute is further divided into 60 seconds. This means that there are 3,600 seconds in a degree. Seconds of degrees are typically used when a higher level of precision is required, such as in navigation or astronomy. For example, when determining the position of a celestial object, astronomers may need to measure the angle in seconds of degrees to accurately track its movement.
About Sign
The sign is an angular measurement that is equivalent to 30 degrees or approximately 0.5236 radians. It is commonly used in trigonometry and navigation to express small angles. The sign is derived from the Latin word "signum," meaning mark or indication.