On 6 April 1917, with a formal declaration of war, the Coast Guard was transferred to the operational control of the Navy. All cutters were to report to the nearest Naval District commander and stand by for further orders. All normal operations were suspended with the exception of rescues pending orders from the Navy. Secretary of the Navy Josephus Daniels directed that although the Coast Guard was then a part of the Navy, that most of the administrative details handled by Coast Guard Headquarters would not be changed. At the outset of the war the Coast Guard consisted of less than 4000 officers and men, had 23 cruising cutters, 21 harbor cutters, 272 rescue stations and 21 cadets at the Coast Guard Academy. The Coast Guard was still in a formative stage of development from the merger of the U.S. Revenue Cutter Service and the U.S. Lifesaving Service. Because of this fact, there was not much interaction between the two former entities during the war. A qualified Lifesaving Service surfman who wished to transfer to a cutter had to be reduced to ordinary seaman upon reporting because of a lack of shipboard skills. Because of this transfers were infrequent. There were no chief petty officers in the Coast Guard at this time and Coast Guard petty officers assigned to Navy ships often served under less experienced supervisors for less pay.
Coast Guard cutters were seen by the Navy as ready assets and were used to fill in for a rapidly expanding Navy. The Navy recognized Coast Guard officers and petty officers as the experienced mariners that they were and often put them on Navy ships to fill in for crew shortages and lack of experience