When you say "navigational hazard," do you mean the construction of the vessels, the condition of waters off Southern California, or both?
Unfortunately, many of the pictures of the SS Catalina show her in terrible shape; she's partially submerged, right now. The sea will claim her someday, as sad a statement as that is.
IMHO, she will be gone, within 2 years. You can see pictures posted in August, on the "Save the S.S. Catalina" thread in the "Other Ships and Shipwrecks" folder.
It's quite a sad picture, especially as the Steamship Historical Society has tried to save her, with Ken Marschall selling his CATALINA prints for the endeavor. Those prints show what a beautiful ship she was; my family took her on the Avalon to Los Angeles crossing, back in 1970.
I, myself, have not been back to Catalina since then, but I imagine the Catalina craft operating nowadays are a poor substitute.
BTW, Mark, my remarks about the Tijuana border deal with the security check points there. In July, when I was with the BTS Group, we had to disembark from the coach, and get in one line to go through immigration and customs; we were fortunate: the regular line for foot traffic was about two blocks long (many people walk across the border, as rental car companies here in California specifically prohibit taking cars in to Mexico, and one needs to be sure and obtain the Mexican vehicle insurance, first; the consequences, otherwise, are not good, if one is in an accident).