SHA is often used in celestial navigation and navigational astronomy. Junks also relied on the compass for navigational purposes. The navigator is responsible for the maintenance of the ship's navigational equipment. Nautical charts must be labeled with navigational and depth information. Indian cartography locates the Pole star, and other constellations of use in navigational charts. Various and diverse methods exist for the correction of electronic navigational charts. Aokigahara has been falsely portrayed as a place where navigational compasses go haywire. ECDIS provides continuous position and navigational safety information. New communications and navigational systems were installed. It consists of a constellation of 7 navigational satellites. Fish aggregating devices and navigational aids were located at various strategic points. An announcement predicts the deployment of a group of communications and navigational satellites by 2040. CFIT accidents typically result from pilot error or of navigational system error. There are three broad categories that cover most web search queries&colon; informational, navigational, and transactional. Compiling new navigational charts may take months or years.