Copy No. _46_ of 46.
S E C R E T
Op-16-Z
NAVY DEPARTMENT
OFFICE OF THE CHIEF OF NAVAL OPERATIONS
WASHINGTON
FINAL REPORT - G/Serial 34
REPORT ON THE
INTERROGATION OF SURVIVORS FROM U-177
SUNK 6 FEBRUARY 1944
CHAPTER IV. GUNS AND AMMUNITION IN U-177
DECK ARMAMENT
First Patrol - One 105 mm. gun forward of Conning Tower.
One 20 mm. single on bandstand.
One 37 mm. gun (old type) on deck aft.
Second Patrol - One 105 mm. gun forward of Conning Tower.
Two single 20 mm. guns on bandstand.
One 37 mm. (old type) on deck aft.
Three M.G.-15s (demountable) on bridge.
Third Patrol - One 105 mm. gun forward of Conning Tower.
Two 20 mm. twin mounts on Platform I.
One new 37 mm. automatic gun on Platform II.
Four demountable M.G.-15s.
AMMUNITION CARRIED ON THIRD AND LAST PATROL
105 mm:
U-177 carried 200 rounds of ammunition for this gun. There were
65 rounds of H.E. packed in gray containers with brown and yellow marking,
65 rounds if incendiary shells in containers marked with a red ring, and
70 rounds of "Zonenmunition" (H.E/A.A. shells) in gray containers with red markings. "Zonenmunition" rounds had yellow markings with black lettering.
In ready-use lockers were 38 rounds of incendiary and H.E., mixed. The rest of the ammunition for this gun was stored in the magazine.
20 mm: 8000 rounds of 20 mm. ammunition were carried.
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S E C R E T
Full Capture report
HERE. Lot of info on this type of U-Boat. It even had a Helo