Markham's flag captain, Charles Johnstone, was next to be questioned. He initially confirmed that he had only accepted the order to turn once Markham had produced his explanation of how it might be carried out. Later, however, he admitted that at the time he commenced the turn he still did not understand how it might be concluded successfully. He confirmed that "Camperdown" had used only 28° of helm instead of the full possible 34°, and had not attempted to turn faster by reversing one of the screws as he might have done. The failure finally to use full reverse in the face of certain collision also remained unexplained. Lieutenant Alexander Hamilton and Lieutenant Barr were both questioned as to what they had heard of conversations amongst the senior officers, making it apparent that confusion continued over what to do at least up to the moment the order to turn was put into effect. Evidence was taken from many other witnesses.