 On top of the Rockpile was a large helicopter pad constructed from heavy timbers.Most of the base's supplies were delivered via helicopter due to its relatively inaccessible location; however, pilots often had to abort landing because of heavy fog, intense rain, and winds exceeding fifty miles per hour.Just as Nui Cay Tri Mountain, or Mutter's Ridge, would be synonymous with the 3rd Battalion, 4th Marines, the Rockpile was consequently linked with the 3rd Battalion, 3rd Marines.