Traverse Board (jan 2, 1500 – jan 2, 1700)
Description:
Traversed Board was used to record the direction a ship was sailing along with the corresponding speed the ship for the same four-hour period, solely developed for maritime exploration, Mariners had tools to determine direction and speed, but they needed a way to record and remember their measurements over a period of time. The Traverse Board did just that, it lasted to 1500CE-1700CEAdded to timeline:
Date:
jan 2, 1500
jan 2, 1700
~ 200 years