Hi all,
The best way to research the NM-01 (Cherusker) and NM-21 (Ubier) is to follow the delivery of the auxiliary whalers yard number 98 and 99 at Moss verft (= yard). Both sister were delivered in 1941 as Cherusker (NM-01) and Ubier (NM-21), and are well documented in primery sources. The information in Gröner/Jung is incorrect, and Dr. Jung is aware of this (it's impossible to write such a work without errors).
When lost they escorted a convoy Kirkenes – Tromsø consisting of the Ludwig, Glattesee, NT-10, Valør, M-321 and V-6111. The Ubier struck the mine first (20:45), and the Cherusker followed (20:50)when she tried to assist her sister.
I have not been able to find any information about raising of the wrecks of the Rutlandshire nor the Jardine, but they might of course have been scrapped if not scuttled in deep waters.
Acording to my sources the Jardine was bombed by Ju-87 aircraft on April 27. and 28. 1940, and scuttled (shelled) by HMT Northern Pride April 30.1940. Regarding the Rutlandshire, I only have German aircraft (not been able to identify the unit yet).
The vessels lost December 6. 1942 off Honningsvåg, are surely the Moss built whalers, as those are good acounted for.

Best regards
Erling