Back in 1966 when Disneyland had the "8th largest submarine fleet in the world", the hulls were still grey, the names taken from the US Navy’s atomic fleet, and the cheesy storyline and audio-animatronics were still fresh, the cast member was still the most important part of the show. Stuff From the Park blog has dugg out and posted the operating manual every castmember had to study and know in order to operate the attraction. There are lots of great photos and details of the attraction. Including one with Walt and one of the attraction models.
Sadly, Disneyland’s Submarine Voyage attraction was shut down September 8th in 1998, despite then Imagineering Chief Marty Sklar’s famous ?"I’ll be a Speed Bump on Harbor Blvd, before I let them tear out the Submarines" comment. I remember my last trip through the dark blue water with an excellent captain named ‘Jade’. One last chance for Mr. Baxter to check the air pressure (a tribute to imagineer Tony Baxter).
Now, the attraction is just a short bit from coming back, this time in the guise of a ‘Finding Nemo’ attraction. DisneySubmarines.org is doing a good job chronicling the change over.