Lieutenant Umbato was a 24th century Starfleet officer serving aboard the USS Enterprise-D under Captain Picard. In 2367, shortly after stardate 44390.1, Umbato broke two ribs during a holodeck exercise and was subsequently treated in sickbay. Worf briefed Data on this as he prepared to take the connn for the night shift. (TNG: "Data's Day" ) This character was only mentioned in dialogue.