Miscommunication

In Center Harbor, Maine, local legend recalls the day when Walter Cronkite steered his boat into port. The avid sailor was amused to see in the distance a small crowd on shore waving their arms to greet him. He could barely make out their excited shouts: “Hello Walter, Hello Walter!”
                                    

As his boat came closer, the crowd grew larger, still yelling. Pleased at the reception, Cronkite tipped his white captain's hat, waved back, even took a bow. But before reaching dockside, Cronkite's boat abruptly jammed aground. The crowd stood silent. The veteran news anchor suddenly realized what they'd been shouting:  “Low water, low water!”

•Maine accent makes "water" and "Walter" sound similar.