The Philippine coastwise emblem is a flag flown at main-mast of marine vessels engaged in coastwise trade in the Philippines. Coastwise trade is the transfer of either merchandise or passengers between two seaports in the Philippines. The flag was first adopted in 1903, following the passage of the Coastwise Trade Act of 1902 by the Insular Government of the Philippine Islands. Under law, the Philippine coastwise emblem is defined to consist of a white rectangular flags with two stars (one blue, one red; from the staff to tip) in the horizontal median line.