Seagull CES Crew Evaluation Test The application will help you prepare for passing computer tests Seagull CES Oil tankers - Support level. Cargo Handling And Stowage (Detailed) The application contains 56 questions on the topic: Oil tankers - Support level. Cargo Handling And Stowage (Detailed) The application is equipped with a convenient search. It is possible to take a practice test that you can set up yourself.