Royal Navy H.M.S. Spey (River Class Frigate K-246)
U-Boat contact & sinking report of U-136, July '42
Note record of U-Boat movement on 4th attack... very slowly
"indeed". then on 5th
"?".
Also, notice use of Mark VII depth charges, then switched to T.N.T. d.c.'s
I find this official sort of record very interesting to imagine similar situations as a subsimmer, yet from below.