That is sad. The status of the crew remains a mystery. Hope, minimal.
I read the coordinates as:
The remains of the yacht are at 19°56.8 S and 174°29.5 W
Perhaps the degree symbol was displayed as the # 0 or letter O?
I wonder why they choose to cast off off with only a reciever, and not a long range transmitter, or an emergency distress beacon. And why they did not keep somebody posted on their progress and status. Without knowing more details it would be unfair to judge their decissions. Perhaps things went bad, one after another. E.g. weather, systems failures. It would be interesting to know if they found clues on the vessel, a log or otherwise.
When in doubt, do the right thing.