you have to do the latter, though it's quite easy once you get to the vessel list. AppData > Zerahypt > Save > Vessels > List
https://www.dropbox.com/s/rsdd20m2dg1s1fl/List.dat?dl=0 there's MY vessel list with all of the vessels i can find. i just CTRL + F each number from 1 to 62 until every single hidden vessel was on there. as for these ridiculous vehicle names, you just change the names of the vehicles in the list file. it doesn't effect anything, it just lets you name them different things.
open start type "%appdata%" hit enter scroll through the folder, there should be a file called "zerahypt" at the very bottom. open it, click on "save" then "vessels" and open the list file with notepad.
Uh,just one problem.it doesnt say'Open With Notepad' fnact,the tab doesnt show up(im using windows 10)