SM U-53

Related time notes

1. Chiefs of Staff of the Axis Navies: (Long Patrol) - P12/14: Henning von Holtzendorff21 Sept 2021
   30:47Submarine operations were already testing American neutralityNotable Point
2. Bruships 23 - New Book Review25 Oct 2020
   1:11:40U-53's raid beside neutral American destroyersNotable Point