One Piece Chapter 43, page 3: Sanji Enters

Suddenly, a large Marine ship sails up alongside them, catching the crew by surprise. Luffy blinks and says, "HUH?" Usopp points in shock, shouting, "IT'S... THE MARINES!" Luffy looks bewildered, asking, "WHEN DID IT...!?" while Usopp panics, "THEY'RE NOT GOING TO ATTACK US NOW, ARE THEY?" Johnny leans over the railing and yells toward the Marine ship, "HEY! WE AIN'T PIRATES OVER HERE!" Yosaku points out, "AH, SOMEONE'S COMING OUT!" as a figure appears on the Marine vessel's deck.