Firefighters responded Thursday morning after flames broke out in a 40-foot fishing vessel moored next to a fuel dock at Des Moines Marina. The fire sent a cloud of smoke over the marina that could be seen blocks away. One man was aboard the vessel when the fire broke out. He was able to jump off onto the dock and was not injured. The man and others pushed the boat back away from the fuel pump as flames and smoke spewed from the interior of the watercraft. Firefighters attacked the blaze from land and using a patrol boat equipped with a fire hose. The cause of the blaze is unknown at this time. The boat was not refueling when the blaze broke out.