Furthermore in absence of relevant flight recording data, there is nothing that could prove to the contrary.
There is also nothing proving it was pressed.
We are operating here purely at a speculation level. Personally I agree, probably it was pressed but still, no proof.
or the landing approach (with its being NDB-based, the geographical coordinates of the ARP are also immaterial).
Just remember the crew of the Yak-40 talking about doing a "mixed" approach NDB + GPS.
Arrakis