Hello Jesse Lee,
I have always used white glue the kind that kids use in school for glueing my ships/vessels to the putty which I make my seas out of. have been doing this since 1969 and have not as yet had any loosening or unglueing of a hull. I have always been able to after letting the the ships/vessels hull sit in the glue for about a day and a half to two days to allow the white glue to set up/dry firmly tug/pull on the lines exiting the bottle etc. whithout any foreward movement whatsoever. Mind you too powerfull a force will most likely result in ship/vessel being pulled out of the putty sea or a mast breaking, the line itself breaking. Please excuse my spelling.