What is the class shown here? I am no expert on US WW2 submarines by anyones standard lol, for all I know it isn't even American.
It is a scan from the book; Warship by Anthony Preston. The picture states that the flattop is the USS Hornet, and the picture was taken at Ulithi, no date given. It does say that Hornet is sporting a Design 3A pattern, which I know was also applied to USS Franklin, in Norfolk, in 1944. So it is not necessarily an early war photo. (The book also states that USS Interpid and USS Hancock used the same
starboard pattern, which leads me to believe that different patterns may have been used on port and starboard for some ships.)