There’s a good article on Diver’s website about the Mikhail Lermontov. This is a big Russian passenger liner that sank between the North and South islands in New Zealand. It is rare to have such a large wreck so easily accessible. You can do dives of different complexity on it, making it suitable for those new to wreck diving as well as those with much more experience.
In what may be controversial, the New Zealand divers who dive it regularly do not use lines when they penetrate it. Their argument is that they are often leaving a different way from how they got in. They have spent many years exploring the wreck and have many many dives on it, so they do know it exceptionally well.
I am hoping to get down to New Zealand at Christmas, and if time permits will try and get a dive in on this wreck.