One nuclear escort complicates enemy timing

An opponent planning an attack has to estimate when a carrier group's conventional escorts will detach, rendezvous with replenishment ships, or require replacements. A nuclear escort removes one ship from that timetable and changes the group's likely bingo point. Concentrating nuclear escorts around one carrier could mark it as the primary strike force. The same concentration could be used as misdirection, forcing surveillance toward one group while another operates elsewhere.