Electronic chart updating manual

The company was founded in 1934, by Elrey Borge Jeppesen, a pilot working for Varney Air Lines, who was the first to make aeronautical charts for pilots to navigate in flight.

The information that he collected and the charts that he drew were at first only for personal use, but fellow pilots quickly saw the benefits of using these charts and Jeppesen started selling copies of his chart book for .

Systems using ENC charts can be programmed to give warning of impending danger in relation to the vessel's position and movement.

ECDIS systems must be certified according to IMO regulations.

ECDIS provides continuous position and navigational safety information.

The system generates audible and/or visual alarms when the vessel is in proximity to navigational hazards.

ENCs are vector charts that also conform to International Hydrographic Organization (IHO) specifications stated in IHO Publication S-57.

This popularity extends to electronic charts, which are increasingly favored over paper charts by pilots and mariners as mobile computing devices, electronic flight bags, integrated electronic bridge systems and other display devices become more common and readily available.An Electronic Chart Display and Information System (ECDIS) is a geographic information system used for nautical navigation that complies with International Maritime Organization (IMO) regulations as an alternative to paper nautical charts.IMO refers to similar systems not meeting the regulations as Electronic Chart Systems (ECSs).Jeppesen was named as a defendant in a lawsuit filed by the American Civil Liberties Union (ACLU) on May 30, 2007, on behalf of several others who were allegedly subject to extraordinary rendition.The suit was dismissed in February, 2008 on a motion from the United States government, on the basis that proceeding with the case would reveal state secrets and endanger relations with other nations that had cooperated.

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