The Army Signal Corps longwave radio station was located at Fort Wood on Bedloe's Island in New York Harbor. It held the call sign WYCB until March 17, 1922, when it became WVP. The broadcasts ended around October of 1922.
 
New York Tribune, February 19, 1922, page 29:

Signal  Corps  To  Broadcast  From  Harbor
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Powerful  Three  -  Kilowatt  Station,  Located  at  Bedloe's  Island,  Will  Send  Out  Interesting  Program
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    The powerful three-kilowatt radio station at Fort Wood, on Bedlow's Island, in New York Harbor, which is operated by the United States Army Signal Corps, call letters WYCB, is now operating a daily broadcasting program between 3 and 10 o'clock in the evening, it was announced yesterday. Broadcasting from this station will be upon a wave-length of 1,400 meters.
    While this is primarily operated for amateur wireless operators with complete equipment, owners who are novices and have only the standard short wave receiving sets can listen in on this program by adding a suitable loading coil in the aerial circuit.
    In connection with the announcement the United States Army authorities issued the following statement:
    "Although the broadcast proposition is not a new one, still the many features incorporated or proposed for incorporation in the broadcast programs of the Amateur Radio Reserve will in most cases be original and of vital interest. They will include educational and amusement details that will appeal to all interested radio men.
    "The Amateur Radio Reserve, 2d Corps Area, U. S. A., is an organization of high-class radio men with which the Signal Corps of the Army is co-operating to the greatest extent in transmitting educational information and assisting the amateur as far as possible. This organization is developing amateur station relay routes from the Fort Wood station to all stations of the Army for the purpose of forming a reliable and efficient network of amateur stations, capable of and actually carrying on official traffic, and, in addition, prepared to carry on the radio communication of the government when called upon by any governmental department.
    "The Amateur Radio Reserve, 2d Corps Area, U. S. A., is strictly a civilian organization, not obligated in any way to either military service, or military training other than obtaining for the benefit of the amateur the full benefits extended by the Signal Corps to all amateurs in a broader manner than might be obtained by the individual."
QST, May 1922, page 53:
With  Our  Radiophone  Listeners
    The photo on this page shows the station operated by the Signal Corps at Fort Wood, Bedloes Island, New York Harbor. The broadcast service is sent on 1400 meters with a 3K.W. set every evening from 9 to 9:55 p.m., call letters WYCB. The development of interest among amateurs and the establishment of contact with them by this and other means, will, it is hoped, result among other things in making practicable the building up of a complete radio net of qualified amateur stations who can and will be willing to assist the regular Army radio net in the transmission of official business during emergency or otherwise.Radio station WYCB