Covering all the bases, usually in professional association magazines like that they do in memoriam announcements based on someone writing in to inform them of the deceased's passing.
So this may not be a comprehensive list, but rather they received a few late notifications of passing from 2020 and 2019 that were published in the 2021 in memoriam section, rather than a full list of the 2019-2020 deaths.
As a sanity test, a single death amongst all airline captains in all of 2019 seems improbably low.
I'm mean them being told the date of death being in 2019-2020, but after publication of 2020's "in memoriam" section. They don't usually republish previous years deaths, but they do publish deaths that should have been in the previous years sections if they find out a year or two too late.
Those date not known entries are for people who they were informed died in 2021, but not the exact date.
Covering all the bases, usually in professional association magazines like that they do in memoriam announcements based on someone writing in to inform them of the deceased's passing.
So this may not be a comprehensive list, but rather they received a few late notifications of passing from 2020 and 2019 that were published in the 2021 in memoriam section, rather than a full list of the 2019-2020 deaths.
As a sanity test, a single death amongst all airline captains in all of 2019 seems improbably low.
Yeah, that's not the case check out this old 'In Memoriam' from ALPA, if they don't know the date they will specify as such
At the very bottom n/a *Date of death not available.
https://i.ibb.co/5xg3Xnj/image.png
http://crewroom.alpa.org/alpa/DesktopModules/ViewDocument.aspx?DocumentID=4960
I'm mean them being told the date of death being in 2019-2020, but after publication of 2020's "in memoriam" section. They don't usually republish previous years deaths, but they do publish deaths that should have been in the previous years sections if they find out a year or two too late.
Those date not known entries are for people who they were informed died in 2021, but not the exact date.