The invention discloses a W90221X-based
global positioning system (GPS) electronic marine map navigator, and belongs to the field of application of computer embedded electronic marine map navigators. The home-made electronic marine map navigator with
GPS navigation function used in inland seas is researched and produced. The electronic marine map navigator is designed by adopting full-automatic
embedded software and hardware; and a
global coordinate system, self-made regional charts of China and partial inland charts of the Yangtze River channel, the
water area of Taihu Lake and the like are adopted in the electronic marine map navigator. Main information capable of being displayed by a host screen comprises real-time Gregorian calendar,
lunar calendar date and Beijing time, real-time position (
longitude and
latitude), speed and direction of a ship,
longitude and
latitude of a cursor point, distance between the cursor point and the ship, direction of the cursor point, marine topographic maps (which can be zoomed in and out and can display the information such as marine area names, navigation marks,
water depth and the like) around the ship, and other comprehensive information (such as sweater temperature,
power supply voltage,
satellite state and the like). A host has the main functions of determining a navigation mode, recording ship positions, a man-overboard boat (MOB), way points, marks and ship routes, editing the ship positions, the way points, the marks, the ship routes and courses, viewing the MOB, calling the way points, the ship positions, the ship routes and anchor points, setting display, parameters, delivery and positioning, measuring the distance, displaying the calendar, data and front views and the like.