Seagull CES Crew Evaluation Test The application will help you prepare for passing computer tests Seagull CES LNG tankers - Operational level. Cargo Handling And Stowage (Detailed) The application contains 62 questions on the topic: LNG tankers - Operational 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.