The FriedrichFiles - my questions on German ships

Who can help by giving sources, books, links ?

Hamburg (later renamed Maksim Gorkij): date of commission/maiden voyage
John T. Essberger (German SAR-cutter, 1975) line drawing of her daughter boat Elsa
Nura (rotator-ship, chemical transport) date of conversion to a rotator ship
Pelikan (German minelayer 1891, rebuilt 1908) line drawing of original condition
Who can identify this auxiliary?

CASA 223 Flamingo ex MBB 223 Flamingo, ex SIAT 223 Flamingo: date of first delivery

Any information for me?

[Flagship] - [My Questions] - [My Link-collection]