How do you abandon ship?

[City Builder]

I arrived in an area and took control (accidentally) of a derilict that I just wanted to harvest, now my crew keeps going over there and dying. How do I get rid of this dead weight from my neck?

https://steamcommunity.com/sharedfiles/filedetails/?id=2178832684

[Keni]

You should recall your crew, and jump away. This will prompt to abandon the derelict. You can jump back, and scrap it after that.

[Sam Look]

You get far more resources if you take control and dismantle everything instead of abandoning (just don't remove hull until you have dismantled all components as you can get some of them "stuck".
After your finished then jump away and it reverts to derelict (albeit empty at this point).

[Spatzimaus]

"You get far more resources if you take control and dismantle everything instead of abandoning"

Yep, and that's a whole other problem all of its own. Dismantling a functional ship is by far the best way to get Tech or Energy blocks, instead of getting tons of scrap that can't even convert to those blocks directly. Ideally, there'd be less of a disparity; scrapping a piece of equipment on a nonfunctional ship should give a mix of blocks and scrap regardless of whether it's a claimable wreck or not. (Exception must be made for your starting ship before its first jump, though.) Right now, though, finding a claimable ship in your first system makes things SO much easier...

But to the original discussion: The others here have already said the long-term solution to abandoning a ship (just jump out of the sector once you've stripped it for parts), but in the meantime you're worried about people going over to the abandoned ship and getting hurt. Go to your Crew Management screen (upper left, icon of a person). It has three tabs: Priorities, Schedule, and Ships. Go to the Ships tab. You'll see three "ships" listed: your normal ship, the newly claimed hulk, and a generic "derelicts" column. By using the right mouse button on each box, you can tell a specific crewman to never sleep, relax, or work on a given ship. So, if you don't want your people going over to that other ship, just change those boxes to the red X option. Just make sure you don't turn the "Work" column to red until you've disassembled all of the bits and pieces.

[Delle(DK)]

a small tip.. You can also go into the crew page and "forbid" them to go to the derelic or forbid them to do different jobs.
Example some crew panic very easy and its not a good place to panic on a derelic with aliens and the panic person run around getting attacked. Then it would be better if they concentrate on mining or growing food.