What is a requirement of a manual water pump in a boat?

A manual water pump on a boat must be designed to efficiently remove water from the hull to prevent flooding and maintain buoyancy. It should be easily operable, allowing crew members to quickly respond in case of an emergency. Additionally, the pump should be durable and resistant to corrosion due to exposure to saltwater. Lastly, it is essential for the pump to have a reliable discharge mechanism to ensure water is effectively expelled from the boat.