Vice Admiral William S. Sims, Commander, United States Naval Forces Operating in European Waters, to the Office of the Chief of Naval Operations, fifth cable of the day.
September 8, 1918.
<4391> Your 904 implies that the Department has not yet developed a mine which can operate successfully in depths greater than twelve hundred feet. I have been previously assured in cable No. _<9327>_ that the present mine would function satisfactorily without alteration in depths up to five hundred fathoms, provided only a mooring wire of smaller diameter were used, and on this statement I have based the plans already put forward for the Adriatic and Aegean barrages. If this information is incorrect all plans must be reexamined and as the Council meets in Paris on September thirteenth I urgently request early information.
I am as strongly in favor as the Department of the mid-Adriatic Barrage and all the necessary auxiliary operations as originally proposed in my cable 3561 but I fear it will be impracticable to secure approval of this plan by all nations concerned although I shall press it urgently at coming meeting of Council. Will Department agree to furnish a military force of twenty thousand marines in addition to battleships and material enumerated in cable. I understand the Department’s assent to the proposed barrage of the Dardanelles to refer to the Euboea dash Cape Kanapitza Barrage described in my 3267. I further understand that the Department would assent to one of the lower Adriatic Barrages provided the mid-Adriatic project could not be adopted and provided our mines can be made operative in deep water. I request confirmation or correction of my understanding.
Source Note: Cy, DNA, RG 45, Entry 517B.