How to cook on a submarine? Are fumes and garbage discharged directly into the sea?

I remembered the famous joke: a cook was cooking on a submarine, and found that the smoke was too heavy, so he opened the window to ventilate, and the submarine sank.

Of course, in fact, in order to ensure the integrity of the pressure-resistant shell, submarines rarely open doors and windows, and the huge sea water pressure difference also determines that it is absolutely impossible to open doors even when sailing underwater. When a submarine cooks underwater, it is natural to try to avoid oil smoke. Specific measures are carefully designed in many aspects related to food safety such as food preparation and cooking methods.

Specifically, the food security of submarines starts from the shore security. Most of the ingredients loaded on the submarine are prefabricated semi-finished products or even freeze-dried products: rice is washable, meat is prefabricated clean meat, and some ingredients have been bagged and sealed on land, not to mention canned meat and canned fruit that can be eaten when poured out in large quantities; After arriving at the ship, the cooking method is also carried out in a basically sealed environment: processing meat in an oven, stewing prefabricated ingredients in a microwave oven, frying in a special sealed rice cooker, and so on. It is indeed inevitable that the air purifier inside the submarine absorbs and treats a small amount of soot. Generally speaking, the principle of cooking in a submarine is to ensure the taste as much as possible on the basis of avoiding oil smoke as much as possible. Of course, in that environment, even delicious prefabricated ingredients such as braised pork chops, barbecued pork and braised beef have lost their appetite for a few days.

As for the remaining kitchen waste after eating and drinking, it should be uniformly bagged for recycling and sealed for drainage-on the one hand, it is to reduce the volume, on the other hand, it is to avoid the air pollution in the ship caused by the corruption of kitchen waste. After the garbage has accumulated to a certain amount, it can be uniformly discarded outside the submarine through a special garbage disposal device (that is, a sea valve) under the condition that the enemy situation is not serious.

The above is an answer from a military aircraft. Welcome to my headline number _