jettison (something) overboard

Translations
выбрасывать (что-то) за борт
In an emergency, they might jettison the fuel overboard.
В случае чрезвычайной ситуации они могут выбросить топливо за борт.
Definitions
To discard or throw something away from a ship or boat, often to lighten the load or in response to an emergency situation.