The ATSB report is clear that the EPIRB was activated
on the afternoon of the 22nd.
Colleen was not really a typhoon on the 22nd.
It had just been upgraded from a tropical storm
to a severe tropical storm.
The ship 100 miles south of the center,
probably never saw hurricane force winds.
But the storm did surprise the Captain
by suddenly stopping,
when he probably expected it to have cleared out
by the time he reached the area.
Other than the beeper,
there was no distress signal.
No cause info.
Assuming for now some sort of hull failure.
This casualty is not in the Japanese FSA?