Anymore, it's a GPS (global positioning system). It used to be a sextant. The sextant could, using multiple sightings, give a sailor a "fix" or location. Other methods include loran, which is a set of transmitters that send out signals at precise times. The difference in the times at which the signals of two transmitters (positioned "usably") arrived applied to a map would get a "curve" along which the ship is located. Another set of readings would get another "curve" and the point at which the two crossed gave a fix. My, how times have changed. See the links below for more information.
Navigation.
sailing
Things nautical. The sea and ships.
it is ETHNOLOGY....the study of chracteristics of different people and the relation ships among them...ans by dia baig from pakistan
These are many ways in which Greek science helps us today.science have many branches and Greek scientist helped in many branches,like : Astronomy,Architecture etc Archimedes told us the way how to check golds purity.Buoyancy principle helped us in building ships. Forensic science is also the gift of Greece.
Yes and no. In order to go faster, a ship must reduce its air and water friction as much as possible, as friction force acts in the opposite direction as motion, ie slows the object down. However, it is friction that allows the propulsion system to 'push' the ship forward. This deals more with viscosity, which is *like* the friction of a liquid. In sailboats, it is the friction with the air that propels the ship.Because friction is related to the area of contact and the vector of the velocity, it is ideal to have the least amount of surface area facing to the direction of motion, which is why most ships have a Vshape in the front.
navagation
It is called navigation
Many ships can move in any direction including backwards
Prince Henry used a scientific way of determining the ships sailing, direction, and the location.
navigaton
sailing
north
It has to do with controlling ships and maritime studies
Things nautical. The sea and ships.
H
I think they keep them in their space ships
Olden day ships move by the wind, the wind pushes the sail and it goes to the direction the wind is going.