GD NASSCO starts construction of ESB USNS Hector A. Cafferata Jr..

According to information published by the US DoD on August 14, 2023, work has begun on the future USNS Hector A. Cafferata Jr. (ESB 8), the sixth in the Expeditionary Sea Base series, at GD NASSCO.
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Expeditionary Sea Base USS Hershel “Woody” Williams. (Picture source: US DoD)

These vessels act as mobile sea bases, supporting various military operations, ensuring the seamless movement of troops, equipment, and supplies.

About the ESB

The Lewis B. Puller-class Expeditionary Mobile Base (ESB) vessels differentiate themselves from their predecessors, the Expeditionary Transfer Dock (ESD), by expanding their role into various operations.

These operations range from special forces missions and maritime security operations to humanitarian aid efforts. While still retaining some civilian crew, these ESBs also feature military personnel to handle the varied missions.

Focused on lower-intensity operations, these vessels ease the operational demand on other high-value U.S. Navy warships. Their area of operation primarily encompasses the Middle East and the Pacific Ocean.

Structurally, their design echoes the Alaska-class oil tanker, with modifications to facilitate mine-sweeping, special operations, and other expeditionary tasks.

The ships can accommodate additional personnel and feature aviation facilities, with a spacious flight deck suitable for CH-53 helicopters and other necessary operational equipment.

Unique features of the ESB vessels include a hangar, ordnance storage, and the ability to conduct underway replenishments. Although their enhanced flight deck adds some top-heaviness, compromising stability in turbulent seas, it's a necessary trade-off to accommodate their aviation capacity.