It is complete with an Ethernet bridge, long-range wireless communications, remotely operated underwater vehicle ... modified deep-capable ROVs to a 50m-long shipwreck at a depth of 150m below ...
As well as specialist divers, remote-controlled underwater devices have been deployed to help the search. One drone used by the Italian coastguard can stay at a depth of 50m for around two hours.
Deep-sea divers exploring waters around Rottnest Island have found the wreck of a Dutch submarine that rescued Australian sailors.