Fisher, C.B., became head of the division, which still remained one of the divisions of the Staff working immediately under the A.C.N.S.

It is to these officers, with their most zealous, clever and efficient staff, that the institution of many of the successful anti-submarine measures is largely due.

They were indefatigable in their search for new methods and in working out and perfecting fresh schemes, and they kept their minds open to _new ideas_.

They received much valuable assistance from the great civilian scientists who gave such ready help during the war, the function of the naval officers working with the scientists being to see that the effort was being directed along practical lines.

They were also greatly indebted to Captain Ryan, R.N., for the exceedingly valuable work carried out by him at the experimental establishment at Hawkcraig.