Talking of orcas, I've just googled how deep whales can dive. Apparently one has been recorded diving to 3km! WTF? How on earth can their bodies take the pressure at that depth?
35 migrants dying is sadder, but it's not as news worthy. A couple of hundred thousand people die every day. Thousands of those are avoidable deaths, so the 35 migrants and 5 tourists are not significant numbers. The difference is really that 5 tourists dying on route to the Titanic is different...
Were there 2 completely separate methods of communication (via different pieces of equipment)?
Where are people hearing banging/knocking? Are they suggesting that some comms are working?