Complex sentence: The unidentifiable remains of those on board were transported to the Redwood City Armory for this difficullt identification and once performed, over some time, were then cremated and ashes were released to claiming relatives, with others being shipped back to Australia.
Split into simpler sentences: The unidentifiable remains of those on board were transported to the Redwood City Armory for identification, which took some time. Once performed, the remains were then cremated and ashes were released to claiming relatives, with others being shipped back to Australia.