Just to be clear: "Zephyros 4" is not a house name but a neighbourhood name there are Zephyros 1 to 3 also each containing multiple houses. And address is not "house named Zephyros 4, unit 20", but "Zephyros 4 Village, house number 20"

Exactly: addr:housename is an addition to addr:housenumber. As in "house number 5, also known as Something Court". And therefore it is incorrect in this case. Now there's a bunch of houses like "number 1 (Zephyros 4)", "number 2 (Zephyros 4)" etc. This is clearly the case where addresses are not on street but in the place. The page for addr:place on wiki describes exactly this case. And it makes no sense to add "housename" equal to place name to every building in named place.

Could you please explain addr:housename setting for buildings within Zephyros Village 4? "Zephyros 4" is not the name for some individual house but for the enclosing group. They have addresses like "Zephyros Village 4, Block 5", not "House 5 aka Zephyros 4". Therefore housename usage seems to be incorrect here.

And notice 4963 is on page 9.

It's here: https://structure.mil.ru/files/morf/military/files/NM_2147.pdf
The whole list is at https://structure.mil.ru/structure/forces/hydrographic/esim.htm

Sad but you are right. It seems I should stop applying these changes then.

It's not an import and not automated edits. I do these changes manually one by one taking the data from open (Creative Commons licensed) source. So I considered that the import guideline is not applied for this case.

The initial source of information for this point is Norwegian EFS here: https://kartverket.no/efs-documents/editions/2021/efs21-2021.pdf Page 23 (number on page 901), notice number 65972. It says "ODAS-bøye (INT1 Q 58), Iso Y 2s:
63° 27.455' N, 10° 22.327' E". Is that source wrong? Anyway I'll cease updating Norwegian info as it is already done with more reliable sources.

It is the item 4655 starting on the page 22. It contains a lot of subitems, the list ends on the page 24 and I cannot tell now which one is about "DW Kattegat South". The section for removal is marked with the word "Упразднить" and fairway is most likely "рекомендованный путь". But anyway please restore it if you know that it is still exists.

Thanks for restoring them for me. Although combination type=pile + pile:category=post looks less standard and supported than type=beacon_special_purpose + beacon_special_purpose:shape=stake. The latter one is rendered correctly by SeaChart and OpenSeaMap plugins. And type=pile seems to be designed with thought of piles as obstacles and construction element rather than navigation marks. I may be wrong here though.

Yes, it should be the same one. Removed.

Fixed

The sectors were probably imported from Norwegian to Russian notices with errors. I've rechecked and my changes comply to the Russian notices which for this changeset refer to Norwegian ones: 13/65115, 14/16135, 16137, 65157-65161/21. I don't have access to the Norwegian notices but Russian ones differ from Kystverket info. Thanks for reverting them.

Also it says that source is Italian Notice 5.13/21

Oh, I've found it! https://msi.admiralty.co.uk/NoticesToMariners/DownloadFile?fileName=22wknm21.pdf&batchId=9872ccea-0c5a-42fd-ba5f-1947b2beb08d&mimeType=application%2Fpdf&frequency=weekly
Page 2.17, item 2263.
It says to draw "limit of firing practice area, pecked line, joining <point list>"

I have no first person information on this area. But there is Russian maritime notification numbered 1641 for year 2022 saying that there's military practice zone here. Here's that document: https://structure.mil.ru/files/morf/military/files/NM_2215.pdf
And this notification states maritime notofication of UK numbered 2263/21 as source. I could not find british notification anywhere though.

There's maritime notification (stated in the source tag) that says "Underwater obstruction with depth above of 4.8m at 40 39 33.5N 74 04 21.8W". This notification originates from USA 2/12334/21.

You are right! My bad. I'll fix it now