CATHERINE CALLAWAY, CNN ANCHOR: New York City is being vigilant this Memorial Day weekend. Recent terror warnings have led to stepped up security on land and sea. And CNN's Brian Palmer spent some time with New York City police department's Harbor Patrol.</s>BRIAN PALMER, CNN CORRESPONDENT (voice-over): Morning on the Hudson. The river is gray. The city is quiet. New York may never sleep, but it's certainly naps. The three man Harbor Charley crew of the New York City police department's harbor patrol is up early, casting off for an 8.5 hour tour. Officer Vinny Mangiamele pilots the vessel. What are you going to be looking for here?</s>UNIDENTIFIED MALE: It doesn't seem like anybody's out here right now, but I mean, if you saw smaller vessels hanging out by the stations or the bridge, you know, it would seem suspicious to us.</s>PALMER: The Harbor unit and the rest of the police department have increased their patrols at landmarks and public places for the Memorial Day weekend because of the various terror warnings. Harbor Charley says they're conducting business as usual, patrolling and observing. But even routine radio calls seem a little less so these days. What was that call from the aviation unit that you just...</s>UNIDENTIFIED MALE: They had a low flying helicopter by the George Washington Bridge. But then they said it proceeded to fly upwards and north and left the area.</s>PALMER: As vessels large and small pass, officer Kevin Harvey continues to stand the river. Officer Jim Santa navigates.</s>VINCENT MANGIAMELE, OFFICER, NYPD: And the public likes to see the police out here. You know, it gives them a sense of security, sense of safety.</s>PALMER: A sense of safety to which Harbor Charley contributes by patrolling the city's waterways and showing the NYPD's colors. Brian Palmer, CNN, New York.
New York Harbor Police Take Terror Warnings Seriously