Confused by contract language in Gameplay Questions and Tutorials Posted January 20, 2015 "Testing" an engine usually means simply activating it through staging by pressing the space bar. "Splashed down", in case you hadn't understood, means that this must be performed with the engine landed on a body of water. Launch a simple rig with the engine and a probe core (it doesn't even need to have fuel) ontop of a booster. Drop it into the sea with a parachute and activate the engine. This should complete the contract.