A big ship called the MV Delta Sounion was carrying lots of oil when some rebels attacked it in the Red Sea.
The ship can't move anymore and the sailors had to leave, so it's like a giant, empty boat.
The rebels said they'll let people come and help the ship, but it's really hard to get to because other rebels are watching it closely.
If the ship spills all the oil, it would be bad for the ocean, so it's important to get it fixed quickly.
