The act of getting up extremely early - sometimes before sunrise (i.e, "dawn") -to go surfing. This term is most often used by Surfers, but it still can be used outside of surfing and refers to getting a very early start to the day.
Bob, Varno, and I are surfing a dawn patrol session at Rincon tomorrow morning.
WW1 phenomenon in which pilots got up extremely early - usually 3 a.m. - ate a greasy English fried breakfast, then went aloft 1/2 hour before sunrise to look for Huns (Germans) on the ground or in the air. In general, refers to getting a very early start to the day.
Billy Bishop did a dawn patrol looking for Krauts.