The 14-inch Naval Railway Battery was built and equipped by the Navy and manned by naval personnel for service in France with the United States Army. It arrived in France in July last under the command of Rear Admiral C.P. Plunkett and was ready for service during August. A part of the battery has been operating with the French against Laon and vicinity, and is understood to have rendered what the French consider very valuable service against the enemy. The entire battery is now with the First United States Army, but data as to what it has accomplished are not yet available. This test of our naval guns of late design and large caliber in long-range firing and the opportunities given to naval personnel to study and observe the artillery work on the western front are considered to be of great value to the service.

The oil pipe line across Scotland.

A United States Naval Pipe-line Unit has completed important service in the construction of a fuel-oil pipe line across Scotland, and is understood to have been asked for by the French to do some work of the same kind for them.

(a) There are yet to be inspected and observed the following activities, which have not so far been mentioned:

Additional naval bases.

United States naval base at Cardiff, Subchaser Detachment Two, based on Corfu, Captain C.P. Nelson, United States naval air stations in Italy.

(b) It is not deemed practicable to visit the United States naval forces based at Gibraltar (Rear Admiral Niblack), nor the United States naval forces based on the Azores, because of difficulties of transportation, as is also the case in regard to the U.S.S. Olympia in northern Russia.

V. United States Naval Aviation in Europe.

Aviation Headquarters in Paris and London.

(a) The establishment of United States naval aviation in Europe has been one of the most difficult and involved tasks which have had to be undertaken and brought into effect. Captain H.I. Cone arrived in Europe for this work about October 1, 1917, and has continued in charge of it ever since. He maintained headquarters in Paris until about August 1, 1918, when he removed to London and was designated as aid for aviation on staff of the commander of United States naval forces in Europe.