On 20 November 1944, USS Mississinewa (AO-59) was anchored in berth No. 131 at Ulithi. At , shortly after reveille, a heavy explosion rocked the oiler. Seconds later, fumes in an aviation gas cargo tank ignited, causing a second explosion. Massive flames immediately burst from midship forward. Bunker C oil immediately engulfed the ship, with aviation gas on top of that. The aviation gas acted like a wick. Fanned by a light wind, the fire spread aft quickly. A few minutes later the fires reached the after magazine and caused yet another explosion to tear through the ship. The ship was abandoned and soon enveloped in flames over 100 ft high. Fleet tugs were immediately brought in to try to extinguish the fire, but in spite of their efforts, at about the ship slowly turned over and disappeared. Fifteen minutes later, the fire on the water was out and Ulithi anchorage was again quiet. This ship was the first to be hit by a Japanese Kaiten manned torpedo. The ship sank with a loss of 63 hands as well as the kaiten pilot.
S2c Akermann was listed as missing in action and later declared dead.