Enlisted men had to bivouac in tents. Typical shelters used for camping include tents and bivouac sacks. After a bivouac on the actual Marinelli hut emplacement, they headed towards the Grenzsattel. Retreating into Rogersville, they made another futile stand at their old bivouac. The two climbers slept for the night in bivouac sacks below the Ice Towers. A bivouac sack is a smaller type of bivouac shelter. Generally it is a portable, lightweight, waterproof shelter, and an alternative to larger bivouac shelters. A winter bivouac can also be made in a snow cave. Players can set up a bivouac shelter in order to heal themselves. The two climbers reached the height of the Eigerwand station and made their first bivouac. The Union force suffered 66 casualties before going into bivouac as darkness approached. There are many different ways to put up a bivouac shelter. Meanwhile, daylight advance parties scouted for the next bivouac site. Ferrie quit the squadron in June 1960 after a disagreement during a bivouac.