sinking after collision

Srecko and Olga Pust were taking part in the ARC-rally and sailing their Sweden Yachts 45 Ciao two-handed and were nearing the end of a long passage from Indonesia to the remote Cocos (Keeling) Islands. The were only 40 miles from landfall. The rudder was all but knocked off in an impact with the submerged object (possibly a whale?).
The boat had been their home for several years while cruising, and they were to lose almost everything in the sinking.

thx Lutz