To know water depths you need a fathometer. For navigation GPS is recomended.
nautical
nautical
You would use a nautical chart. Nautical charts are specifically designed to show water depths, navigational aids, obstructions, and other information important for safe navigation on bodies of water.
It shows depths of water and navigation routes, including islands and coastlines.
navigation on water.
water depths and navigational routes
A map of a water route would typically show bodies of water, such as rivers, lakes, and oceans, along with ports, navigation markers, and other relevant landmarks for navigation. It can also include information on currents, depths, and potential obstacles to help sailors plan their journeys effectively. Charts and GPS technology are commonly used in modern times to assist in navigating water routes.
A map used for navigation at sea, with water depths and coast line features marked. Often referred to as Admiralty Charts.
because it was easy for them to travel. C'mon people
because they were faster
Nautical charts are best for maritime navigation as they provide detailed information about water depths, tidal currents, buoy locations, and potential hazards such as rocks or wrecks. These charts are specifically designed to aid in safe navigation at sea.
Active sonar is commonly used for navigation purposes. It works by emitting sound waves into the water and measuring the time it takes for the waves to bounce off objects and return to the source, allowing for the calculation of distances and depths.