Within the last few years special flags have been designed for the
President, the Secretary of the Navy and Secretary of War. The
President’s flag is a very beautiful blue banner, in the center of
which is a spread eagle bearing the United States shield on its breast,
with the thirteen stars in a half circle overhead. It is flown at the
main mast-head of naval vessels while the President remains on board,
and on being hoisted it is the signal for the firing of the President’s
salute.