Ghormley also conveyed weak or indecisive communications to his commanders and was absent at critical planning meetings, which were marked by vociferous arguments between Admirals Frank Jack Fletcher and Richmond K. Turner over the length of time that carriers would be able to provide air cover to landing forces and supply ships. Fletcher seemed to place more concern on protecting the aircraft carriers and on the overall fuel needs of the fleet over the immediate support requirements of the invasion force. Part of the problem was also due to Fletcher's attempts to interpret Admiral Nimitz's dictum against over-exposure of carriers to attack unless more damage could be inflicted upon the enemy; Admiral Fletcher was left to interpret this rather than Vice Admiral Ghormley, and Fletcher's interpretation was seen as over-cautious. The heated arguments aside, Ghormley had assigned Fletcher as the Commander, Expeditionary Force who had overriding authority to move carrier air support out of the battle area. After only 36 hours, and with at least two to three days (estimate as high as five by Turner) needed to unload supplies to the Marines fighting on Guadalcanal, Fletcher ordered carriers to pull out of the immediate critical invasion operation, leaving many supply ships unloaded and vulnerable to Japanese attack, and with no carrier air support for ground forces.