splash down
To crash or land in a body of water. The actress's private seaplane splashed down on the lake outside of the film festival, and she exited the aircraft in a stunning sequin dress. Officials are scrambling to determine where the astronaut's capsule splashed down as they lost touch with it just before re-entry.
splash down
[for a space capsule] to land in the water. The capsule splashed down very close to the pickup ship.
splash down
Land in water, as in The spacecraft splashed down within a few hundred yards of the pickup point. The splash in this idiom alludes to the impact of a solid body on water. [c. 1960]
splash down
v. To land in water. Used of a spacecraft or missile: The spacecraft splashed down in the Atlantic Ocean.