e Boston Whaler. High-speed outboard motor boats used to ferry up to eight persons betweenislands. The availability of boat transportation and the travel time between islands were frequently the pacing factors in accomplishing a given task. All boats required a great deal of maintenance and frequently work schedules had to be revised because of boat problems. The Navy crews worked hard, but the dilapidated condition of many of the landing craft was difficult to overcome. During a few brief periods, the DOE Research Vessel Liktanur (based at Kwajalein) was used at Enewetak as a dormitory ship for staging small ERSP work parties at remote islands. The improvement in operational efficiency was significant--most of the day could be devoted to workon the islands. Vehicle. During most of the project, ERSP had the following complement of vehicles to support its activities: On Enewetak Island: On Ursula: e Two Carryalls e Four Bicycles e Plus occasional use of a pickup truck and forklift. e Two four-wheel drive weapons carriers to support the three IMPs which were based there. Helicopters. The U.S. Army element had four UH-1H turbine powered helicopters at Enewetak. Their primary assignment was search and rescue (medical evacuation). Secondary uses were for command and control, reconnaissance and inspection, and twice-weekly mail runs to Ursula. Occasionally, ERSP obtained helicopter support for transporting small numbers of personnel and/or critical radiation survey equipment to locations where they were urgently needed. Dramatic savings in time resulted when this was possible, especially when working at the difficult-to-reach northwestern islands, LARC. The Army element had four remarkable conveyances known as "LARCs," These were amphibious vehicles capable of travel across land on tires about 10 feet in diameter and travel in the water powered by propellers. A droppable front-end ramp enabled vehicles as large as 20-ton dumptrucks to be driven aboard and be transported nearly anywhere. Use of the LARC was vital in taking heavy equipment to islands surrounded by shallow water such as in the northwestern quadrant of the Atoll which could not be reached by the LCUs or LCMs. The ERSP IMPs traveled by LARC to such places. Transportation-Off-Atoll Personne] traveled to and from Enewetak on MAC C-14]1 cargo aircraft operated by the USAF. The C-141 is jet powered with four engines and can carry a load of about 36 tons. The cargo hold can be fitted with passenger seats. In the configuration usually flown to Enewetak, the aircraft carried sixty seats, a comfort pallet (alley and latrines), and 20 tons of cargo and mail. Usually, there was one combination passenger/cargo flight each week to and from Enewetak. It would originate at Hickam AFBin Honolulu, fly 4-1/2 hours, stop at Wake Island for an hour, and reach Enewetak after another hour's flight. The aircraft would continue on to Kwajalein for crew rest and refueling. The following day, the aircraft would reverse the above route, carrying passengers, mail and retrograde cargo to Honolulu. In addition, there was at least one cargo flight from Hickam to Enewetak each week. Frequently, these “all" cargo flights could and did carry a few passengers in web seats along the wall. 80