If it helps an enquiry with the Bundesarchiv-Militärarchiv (BA-MA), in the thread [www.forum-marinearchiv.de], item #8, there is our list with grid-references (alphabetically sorted) and next to it on which grid maps all or part of said grid can be seen.
Map references with the suffix + are available at the BA-MA at Freiburg.

Regards,
Walter

(also 'ARANTALES' in HMA/FMA)