Adam - I believe the " Bay Fisherman " and " Yacht Club " are both " Launches " ! In doing reseach today on the models and the position of the helm console , I made a discovery ! In looking at the Herreshoff Brochure of the 6 cat hull models , I noticed that the " Yacht Club Launch " has a (wooden) Shift Handle in it ,which means that the helm console would have been on the port side and I believe that the " Bay Fisherman model " also had the same helm console configuration and that both models had a boarding step ladder. According to the Bay Fisherman Brochure had a standard 15 hp motor ( Gas or Diesel ) and the Yacht Club had a standard Westerbeke Diesel 30 hp engine and more Safety features along with being US Coast Guard Certified for marinas/club to use for hire...... As far as the Center Console model, I believe they were Custom order boats with boarding ladders (optional) , which makes your theory " Correct " ..... I will post up pictures of both Models with descpritions !