The mark consists of the word "USHARBORS" in all caps, with "US" in navy blue and "HARBORS" in slate blue; with a thin gray line running horizontally under the text; with a series of twelve nautical flags arrayed horizontally beneath the gray line, grouped by five to the left and seven to the right, with the flags, in order from left to right, having the following patterns: first flag, having three vertical bands, red, white and royal blue, arrayed from left to right, encircled by a gray outline; second flag, having a black circle centered on a yellow field, encircled by a gray outline; third second flag, having three horizontal bands, yellow, royal blue, and yellow, arrayed from top to bottom, encircled by a gray outline; fourth flag, having two horizontal bands, royal blue and red, arrayed from top to bottom, encircled by a gray outline; fifth flag, having a royal blue square centered on a white field, encircled by a gray outline; sixth flag, having a red square centered on a small white field, all centered on a larger royal blue field, encircled by a gray outline; seventh flag, having two horizontal bands, royal blue and red, arrayed from top to bottom, encircled by a gray outline; eighth flag, having two vertical bands, white and royal blue, arrayed from left to right, with a white triangle placed over the royal blue band, encircled by a gray outline; ninth flag, having three vertical bands, red, white and royal blue, arrayed from left to right, encircled by a gray outline; tenth flag, having two vertical bands, white and red, arrayed from left to right, encircled by a gray outline; eleventh flag, having two horizontal bands, royal blue and red, arrayed from top to bottom, encircled by a gray outline; and twelfth flag, having a yellow cross centered on a red field, encircled by a gray outline.