Engine: Engineering Safety

1. A holding its slops onboard until they can be discharged to a shore side reception facility
2. B holding its slops onboard until they can be pumped into the city sewer system
3. C circulating them through the lube oil purifier to remove water and debris
4. D pumping them into a settling tank for separation before pumping the oily water residue overboard

Tip: press A-D to answer