Narrative:

This was a busy weather deviation day in the gulf of mexico. Almost all aircraft were deviating in and out of non-radar airspace. During these days; coordination with [foreign] center is critical as aircraft frequently deviate off their route crossing the flight information region.there is one controller at [foreign] center that consistently increases our controller workload due to his old age and frequency in which he makes mistakes. There was even one instance when we physically called down to [foreign] center and requested he be removed from position while we conducted a d-side evaluation.in this case; aircraft X was a northbound aircraft that was not coordinated as deviating at all from the airway. This aircraft became overdue so we reached out to another pilot who was able to raise them on guard. When we gained communications with aircraft X the pilot informed us that they were currently 95nm southwest of their route deviating for weather. When asked what deviation clearance was issued to them; the pilot replied 'we were instructed to deviate to the west'. That's it. This aircraft deviated the protected airspace of two parallel airways. Luckily there was no other traffic at FL320 so it did not cause a separation error but this could have been far worse. My recommendation would be for [foreign] center to remove [controller] from working traffic permanently. This is not the first or last time this will happen otherwise.

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Original NASA ASRS Text

Title: Center Controller reported problems with a Foreign Center Controller that allowed an aircraft to deviate 95 nm SW of the assigned route without advising the US Center.

Narrative: This was a busy weather deviation day in the Gulf of Mexico. Almost all aircraft were deviating in and out of non-radar airspace. During these days; coordination with [Foreign] Center is critical as aircraft frequently deviate off their route crossing the Flight Information Region.There is one controller at [Foreign] Center that consistently increases our controller workload due to his old age and frequency in which he makes mistakes. There was even one instance when we physically called down to [Foreign] Center and requested he be removed from position while we conducted a D-side evaluation.In this case; Aircraft X was a northbound aircraft that was not coordinated as deviating at all from the airway. This aircraft became overdue so we reached out to another pilot who was able to raise them on guard. When we gained communications with Aircraft X the pilot informed us that they were currently 95nm southwest of their route deviating for weather. When asked what deviation clearance was issued to them; the pilot replied 'We were instructed to deviate to the West'. That's it. This aircraft deviated the protected airspace of two parallel airways. Luckily there was no other traffic at FL320 so it did not cause a separation error but this could have been far worse. My recommendation would be for [Foreign] Center to remove [Controller] from working traffic permanently. This is not the first or last time this will happen otherwise.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.