Delta Air Line (NYSE:DAL) says it has closely worked with the Ministry of Transport to develop GPS procedures to improve the safety and reliability of aircraft operations at the Roberts International Airport.

According to a release, Delta Air Line has developed these GPS approach procedures specifically for Liberia using U.S. Federal Aviation Administration standards.

The release said the collaborative work highlights Delta's ongoing commitment to Liberia and the safety of its people.

"GPS Approach procedures work by shifting navigational reliance from ground based instruments to aircraft based equipment which utilizes space-based GPS systems for navigation; once adopted by the Liberian government, these procedures will be available to any airline with properly equipped aircraft, opening up Roberts International to more international carriers," the release said.

The release quotes Delta's Commercial Manager for West Africa and East Africa Bobby Bryan as saying the airline is delighted to partner with the Liberian government to upgrade the country's airspace technology by improving its overall safety and reliability.

He said safety is Delta Air Line foremost priority, noting that the new GPS Approach will help ensure the safety of airlines flying to Liberia as well as helping to build further links between Liberia and the rest of the world.

Delta is the only airline to offer direct service between Liberia and the United States and operates three weekly flights to the U.S. via Accra, Ghana.

The airline opened a dedicated terminal at the RIA in 2012 providing upgraded facilities for passengers departing Liberia.

According to the release, Delta serves more than 160 million customers yearly.