A submarine canyon is a steep-sided valley that is cut into the bed's of the continental slopes and is an extension of the continental shelf and gains a height of 5 meters. The submarine canyons are found on the active margins and active margins and turbidity are denser and their erosion is triggered by the underwater landslides.
The astrolabe is an inclinometer, that is considered to ba analog calculator that is capable of solving the several different types of the astronomy and is mostly used measuring the altitude and the navigational aspects of the celestial bodies day and night and it was used in the Islamic golden age and the middle ages. It is also helpful in determining the land and the sea latitude.
