The RRS James Cook left at 2pm yesterday. All participants and the crew were already on board for at least 24 hours and were busy unpacking, storing, securing every single item that will be used during the expedition.
Problem n°1: We had no internet connection until this morning and it is still very weak.
Clare, Philipp and the technicians put a small metal ball (calibration sphere) about 25 m under the ship, they turned on the echosounders and recorded the echoes from the ball.
Problem n°2: We guess that one of the seals played with the calibration sphere for a while - delaying the work for 2-3 hours!