Tanker Sola and Norwegian navy frigate Helga Ingstad collide off Norway

I was puzzled by the criticism levelled at the HI for changing the watch. It is reported that the 4 to 8 watch were on the bridge 20 minutes before handover which should have been sufficient time to get a handle on the situation; unless of course they spent the time discussing last weeks run ashore.
Was there a data recorder on HI that recorded the bridge conversation or is what was said over the VHF the only voice recording available?