The last of 48 Bowery Boys movies released from 1946 to 1958.
The ship depicted as taking the boys to England is the RMS Queen Mary. Her maiden voyage was in 1936 and she sailed the Atlantic, primarily, for the Cunard Line until 1967, save for being used as a troopship in WWII. Since 1967 she has been restored and permanently moored at Long Beach, California as a museum, and hotel with nice restaurants.
According to the hats the boys wear while working aboard ship, they are sailing on the "R.M.S. Steamship".
With the exception of several television roles that same year (1958), this final Bowery Boys feature marked the end of the film career of David Gorcey (aka "David Condon").