pretty simple. just open the locations menu then select and location but then press cancel and you will spawn there but beware, this does not work with all the vehicles and they may explode because they clip into the boat but this is how you get on it and unfortunately it is not an unlockable location but you don't need to make a custom one. Hope this helps and that people still care about this whole question.
It would be cool if android users (me being one of them) could have this mod.
+5pretty simple. just open the locations menu then select and location but then press cancel and you will spawn there but beware, this does not work with all the vehicles and they may explode because they clip into the boat but this is how you get on it and unfortunately it is not an unlockable location but you don't need to make a custom one. Hope this helps and that people still care about this whole question.