Many thanks! I can reinstall SH4/UBM now.
Besides I collected data about all Type IXD2 U-boats which actually operated from Penang as a part of "Monsun Gruppe". I counted only U-boats that successfully reached Japanese bases and were not sunk en-route. Here you are: U-178, U-181, U-196, U-859 (had snorkel since February 1944), U-861, U-862 (had snorkel since at least August 1944).
So there were only six such boats with two of them equipped with snorkel. I think this data may be useful for all "Monsun Campaign" creators.