Red Hook's Atlantic Basin was the main port of entry for early Puerto Rican migrants. They traveled on the ships of the NEW YORK & PORTO RICO STEAMSHIP COMPANY" (aka, PORTO RICO LINE).

Jose Mendez is quoted in Place Matters, a joint project of City Lore and the Municipal Arts Society, that the NEW YORK & PORTO RICO STEAMSHIP COMPANY's Pier 35 in Red Hook, Brooklyn was the "Plymouth Rock" of the early Puerto Rican migration (1906 - 1928).  It was the first stopping point and often new neighborhood for Puerto Rican pioneers that came to the United States after the Spanish American War thru to WWI, 1906 to 1928.

Shipping News announcing the SS Coamo leaving from Pier 35, Atlantic Basin

Brooklyn Daily Eagle,  September 29, 1912: 

NEWS OF SHIPS AND PORTS.

- - The New York and Porto Rican Line's steamship Coamo sailed yesterday afternoon from the New York Dock Company's Pier 35, Atlantic Dock, for Son Juan. She takes out 189 passengers and a full cargo of general merchandise, most of it American manufactures.