Having read your post and seeing the count of the number of bunks, etc., I have to believe you are correct about the sketch being for the JOSEPH T ROBINSON. The commanding officer and keeper of the log, Lt(j.g.) Edmund R. Williams, was with this troop transport from December 1943 into April 1944. The crew list you found on Ancestry is for this voyage.
Lt(j.g.) Williams sailed with thirty-seven (37) men. Lt(j.g.) Roberts was in charge of communications and Ens. Jenkins had commanded the original crew of the ROBINSON, ninteen (19) of whom carried over to the new crew. As for Schirmer, he was left in a hospital in Naples, Italy, and so was not aboard when the ship arrived in the US.