In fact, the Soyuz is designed to make an emergency water landing, and has done so once by accident, when Soyuz 23 landed by accident on a frozen lake. The landing didn't go particularly well, the parachute filled with water and caused the escape hatch to be covered in water. A complete account can be found here, but let's just say the experience was less than pleasant.

In fact, the Soyuz is designed to make an emergency water landing, and has done so once by accident, when Soyuz 23 landed by accident on a frozen lake. The landing didn't go particularly well, the parachute filled with water and caused the escape hatch to be covered in water. A complete account can be found here, but let's just say the experience was less than pleasant.