A sailboat called a tug pushing an oil barge and asked him to yield right-of-way. Tug captain replied something to the effect: "I don't know which of the dozens of boats you are captain, but I suggest and request you stay out of my way.... I have limited view and even more limited ability to maneuver, and have a full load". Sailboat captain comes back and starts describing his boat and sails and says he's racing. Tug captain replies "I don't know which you are and strongly suggest you cross behind me. Please DO NOT cross my bow." Silence on the radio.

... About one minute later some anonymous person gets on and says; Here's a math problem for the sailboat: How many times does an oil barge go into a sailboat? Answer: "One, remainder zero."