There's been a bit written about UDT-4, I thought I'd copy and paste just a few paragraphs...
(I believe this is from notes compiled by Robert Allan King of the UDT-SEAL Museum).
"Leaving Guam on 23 July, the APD transported the team to Maui via Saipan and Eniwetok. There the time was passed in further training and perfecting methods developed at Guam. On 14 September, aboard the USS Goldsborough (APD 132), headed for Eniwetok, the team prepared equipment for landings on Yap. Orders were received en route, however, that the Yap Operation was canceled, but that FOUR was to participate in the landings on Leyte.
In company with the fire support and bombardment group, the APD proceeded through a typhoon, the violence of which prevented any further preparations of equipment, arriving at Leyete Gulf on the morning of 18 October. The team was scheduled to make a reconnaissance of Violet Beach near Dulag, after a preliminary bombardment, but because the typhoon had delayed the work of the mine sweepers, it was impossible to take heavy units of the fleet into the gulf to support the teams. Nevertheless, at 1500 that day, incompany with the other teams, Team FOUR, with four APD's and five destroyers for fire support, closed the beach to 6000 yards, where boats with three platoons put over the side while one platoon acted as standby. As the landing craft approached the beach, they were met by intensive mortar, machine-gun and small arms fire.
Platoon TWO, proceeding to within one hundred-fifty yards of the shore, launched its swimmers. Just as the last of these swimmers cleared the boat, two hits were received which wounded three men. The boat, in sinking condition, was headed out to sea; lifeboats on the wounded were inflated, and the rescue landing craft was called on the radio. Machine gunners continued to answer the fire from the beach, but two addtional hits sank the boat. The wounded were towed out to meet the approaching rescue craft.
Platoon FOUR, meanwhile, had been heading for the beach but was forced to retired at 350 yards under exceeding heavy fire. Noticing that boat TWO had been hit, FOUR went to its rescue, ordering the rescue craft to stand by for the swimmers previously launced by Platoon TWO. At the time time, the GOLDSBOROUGH closed on the beach to give fire support. While so engaged, she received a direct hit on her number one stack which killed two men and wounded sixteen. Of this number, six were from demolition personnel. One of whom, W.B. Kausman, was killed..."