A high-tech British ship is helping out in the search for a missing Malaysian jet's black box. 

The HMS Echo arrived in the southern Indian Ocean earlier today with detection equipment. 

Australian authorities said a Chinese ship has twice detected pings in the area. 

However, it's not clear where or what the signals are coming from.

It's believed Malaysian Airlines Flight 370 went down last month in the southern Indian Ocean. 

All 239 people on board are believed to have died.