Pennant numbers of RN and Dominion ships...

[Litvyak]

So recently I've started working on fleshing out the historical ships of the Royal BC Navy... a couple of teasers:

HMBCS Eyrie

HMBCS Vespiary

River-class submarines

... and I've discovered the abyss that is/was the pennant/pendant numbers of RN and Dominion ships.

So I have to ask: are there any good online resources for figuring out what numbers I can use for RBCN ships? Or should I just use some numbers and assume that everything is somehow balanced out in the background in the AltBC world for the other navies?

I'm thinking that sometime post-war (I have 1949 in my head, will probably go with that) the RBCN switches to something akin to the RAN system of using the US classification symbol with a 3-digit pennant number in which the first digit is always a 9, and the second and third digits are sequential... so in this system the carrier Indefatigable, which had had pennant number R10 in the previous system, would have become CVL-901 ... does this seem reasonable?

[GTX_Admin]

Can't really help with the questions...but great to see you back.

[Litvyak]

Glad to be back... I kinda wanted to reappear with a big bang of new AltBC stuff, but then got bogged down with things like postcodes, air travel around the *there* world, railway lines, highways, etc, so don't have much visual to show, except lots of writing on the AltBC wiki... oh, and documenting other minor events around the world such as the dissolution of the USSR that also included the dissolution of the Russian Federation, you know, nothing major...

[apophenia]

... and I've discovered the abyss that is/was the pennant/pendant numbers of RN and Dominion ships...

Well put! The following may be useful if you want to avoid already-assigned numbers (although it is from 1918 not the 1928-1929 dates you'd need for Eyrie and Vespiary. -- https://www.naval-history.net/WW1NavyBritishShips-Dittmar6PendantNos.htm

I note from the above ref that tenders have the 'flag superior' prefix 'N' - eg: HMS Bouncer (N.12); HMS Wave (N.60); and HMS Nettle (N.74). Those WW1 ships weren't aircraft tenders but I assume that the 'N' flag superior would stand.

Frustratingly, for actual RN aircraft/floatplane tenders, I can't seem to find a single pennant number 

Do any Aussie members know the pennant number for HMAS Albatross? She would have been a contemporary of HMBCS Eyrie and Vespiary.

[GTX_Admin]

Do any Aussie members know the pennant number for HMAS Albatross? She would have been a contemporary of HMBCS Eyrie and Vespiary.

As in the Seaplane tender?  The ship's Second World War Pennant Number was D22.