ning September 10 while the Marsh was engaged in 4 sea-air rescue mission. The third leg, from Kwajalein to Eniwetok, was started September 17 and completed September 20, Equipment The collecting equipment used on the Marsh was the same as that used on the Walton. Installation was approximately the same. Photographs of the major items of equipment installed aboard the Walton appear in UWFL-46. Space below decks for quarters and equipment consisted of the after oompartments for officers' quarters, chief petty ‘officers' quarters and crew's berthing. The major items of equipment were 1. A continuous surface water monitoring probe with tank and water connections, a unit designed and constructed by the Health and Safety Laboratory of the New York Operations Office. 2. <A power winch feeding a 3/16-inch steel ¢able over an A-frame and davit for use with plankton nets and water sampling bottles. 3. A steel platform extending two feet over the portside of the ship under the davit to provide space for work with nets and water sampling bottles. 4, A temporary chemistry laboratory. 5. Three nuclear radiation detection instruments. 6. A bathythermograph which was part of the ship's equipment.