How I did it:
Move two captured frigates to a planet.
Let the computer attack you.
In the deployment window:
Right click on one of the frigates - scrap it.
It’s icon does not disapear.
Scrap the other one (icon remains).
Auto Deploy -> crash.
Confirmed. Scrap any ship in the deployment screen and the icon remains. This icon then becomes a crash hazard (left/right click and select option crashes the game).
I’ll just remove the right click menu from those icons in the deployment screen, there is no need for that menu there anyway.
Thanks