Subchasers and seaplanes, most likely at Annapolis. Early post-war.

Photograph of submarine chasers. T. Woofenden Collection.

Photograph detail showing sea planes. T. Woofenden Collection.

Ian Burns notes, The smaller floatplane is a Vought UO-2 Corsair
which entered US service ca. 1926. The large floatplane is, I think,
the Consolidated XPY-1 which first flew late in 1928. So, it looks
as if the photo dates from around 1929.