Which is navigation system?
A navigation system is a computing system that aids in navigation. Navigation systems may be entirely on board the vehicle or vessel that the system is controlling (for example, on the ship’s bridge) or located elsewhere, making use of radio or other signal transmission to control the vehicle or vessel.
Where does a navigation controller go on a computer?
Typically, a navigation interface displays your custom content in the gap between the bottom of the navigation bar and the top of the toolbar or tab bar (see Figure 1-1 ). However, a view controller can ask that its view be displayed with a full-screen layout instead.
Where do I find the navigation controller on my iPhone?
Let’s look at the navigation interface used in the settings app on iOS. All the View Controllers embedded in the Navigation Controller contain a navigation bar that contains the title of the view controller and back button. The top view controller is removed from the navigation stack by tapping the back button.
How are view controllers managed in navigation stack?
You can modify the delegate and the other view controllers on the navigation stack. The navigation stack is a last-in, first-out collection of custom view controller objects that is managed by the navigation controller. The first item added to the stack becomes the root view controller and is never popped off the stack.
How does child view controller work in navigation?
Even though one or more child view controllers are managed into navigation stack, only one view controller appears on-screen at an instance. Selecting an item in the view controller pushes a new view controller on the screen. This process is animated and therefore hides the previous view controller.
What does guidance navigation and control stand for?
(February 2012) Guidance, navigation and control (abbreviated GNC, GN&C, or G&C) is a branch of engineering dealing with the design of systems to control the movement of vehicles, especially, automobiles, ships, aircraft, and spacecraft.
What is the difference between navigation and control?
Navigation refers to the determination, at a given time, of the vehicle’s location and velocity (the ” state vector “) as well as its attitude. Control refers to the manipulation of the forces, by way of steering controls, thrusters, etc., needed to execute guidance commands whilst maintaining vehicle stability.
Why are GNC systems used for navigation and control?
Therefore, systems—now almost exclusively digital electronic—are used for such control. Even in cases where humans can perform these functions, it is often the case that GNC systems provide benefits such as alleviating operator work load, smoothing turbulence, fuel savings, etc.
What is the main function of a control unit?
The main function of the control unit is to fetch and execute instructions from the memory of a computer. It receives the input instruction/information from the user and converts it into control signals, which are then given to the CPU for further execution. It is included as a part of Von Neumann architecture developed by John Neumann.