Midway Class Aircraft Carrier (CV-41) — Asbestos in the Cold War's Longest-Serving Carrier Class

The Midway class aircraft carriers — three ships commissioned between 1945 and 1947, USS Midway (CV-41), USS Franklin D. Roosevelt (CV-42), and USS Coral Sea (CV-43) — were the largest aircraft carriers in the world at commissioning and represented a significant advance beyond the Essex class in size, armor, and aviation capacity. Midway class carriers were powered by twelve Babcock & Wilcox high-pressure boilers generating steam for four sets of turbines producing approximately 212,000 shaft horsepower — a twelve-boiler propulsion plant of exceptional power and complexity unique among US aircraft carriers. The class served as frontline carriers throughout the Cold War, with all three ships undergoing extensive modernizations that substantially altered their original profiles while retaining the powerful twelve-boiler steam propulsion plants. USS Midway served 47 years in commission — the longest of any US aircraft carrier — and is now preserved as a museum ship in San Diego. The twelve-boiler steam propulsion plant throughout the Midway class was insulated with asbestos-containing materials consistent with WWII-era and postwar naval construction, creating one of the most extensive engineering asbestos exposure environments in the surface fleet for the Boiler Tenders and Machinist’s Mates who maintained the twelve-boiler plant through the class’s decades of Cold War service.

Midway Class Twelve-Boiler Steam Plant Asbestos

The Midway class steam plant created exceptional asbestos exposure due to boiler count:

• Babcock & Wilcox boiler casing insulation — the twelve Babcock & Wilcox boilers in Midway class carriers’ boiler rooms were insulated with asbestos block insulation on boiler casing exterior surfaces and asbestos pipe covering on boiler steam connections. The twelve-boiler count — compared to eight boilers in Essex class carriers — created proportionally more asbestos-insulated boiler surface area in the Midway class engineering plant. Boiler Tenders maintaining the twelve boilers during Cold War Pacific and Atlantic deployments worked in continuous proximity to the asbestos boiler casing insulation throughout each engineering watch rotation in the carrier’s boiler rooms
• Main turbine and steam system insulation — the main propulsion turbines and the extensive main steam distribution system connecting twelve boilers to four turbine sets in Midway class carriers were insulated with asbestos block and pipe covering throughout the engineering spaces. The larger-scale steam plant of the Midway class required a proportionally more extensive main steam piping system with corresponding greater asbestos insulation surface area compared to smaller carrier classes
• Engineering space pervasive asbestos background — the Midway class engineering plant — boiler rooms and engine rooms — was constructed with asbestos-containing pipe insulation and structural insulation forming the background asbestos environment for the engineering ratings who stood watches and performed maintenance in the engineering plant. The twelve-boiler plant occupied more engineering space area than any other carrier class’s propulsion system, creating a larger background asbestos exposure environment for the engineering crew

Cold War Modernization Programs and Retained Asbestos

Midway class modernizations extended service while retaining legacy asbestos:

• SCB-110 and SCB-101 modernizations — the SCB-110 (Midway and Coral Sea) and SCB-101 (Franklin D. Roosevelt) modernizations performed at naval shipyards in the late 1950s and early 1960s substantially altered the ships’ island structures and flight deck configurations. Shipyard workers performing these modernizations encountered the existing asbestos insulation in the twelve-boiler propulsion plant during the shipyard work period, while installing new asbestos-containing materials in the modernized ship structures
• CV-41 and CV-43 continued service through the 1990s — USS Midway and USS Coral Sea continued service into the late Cold War and post-Cold War period — Midway served 47 years total, Coral Sea 45 — with the twelve-boiler propulsion plants and original asbestos insulation retained through the ships’ extended service lives

VA Claims for Midway Class Veterans

VA presumptive service connection under 38 CFR § 3.309(d) covers asbestos exposure aboard Navy aircraft carriers. Boiler Tenders, Machinist’s Mates, and crew members who served aboard Midway class aircraft carriers and have since been diagnosed with mesothelioma, asbestosis, or asbestos-related lung cancer may qualify for VA disability benefits.

Source notes: equipment-manifest entries (where shown) are sourced from public-record BUSHIPS (Bureau of Ships) documentation, NARA archives, and the public asbestos litigation record. Manufacturer attributions link to documented asbestos-product histories on AsbestosIndex.com where available. Nothing on this page constitutes medical or legal advice.