US Navy and Marine Corps Yearbook 2021 Lockheed Martin's F-35 Lightning II is at the centre of this year's big stories. The F-35C will embark on its first deployment as part of a carrier air wing and the F-35B continues to form part of Marine Expeditionary Units embarked on US Navy amphibious assault ships. Similarly, the US Navy's test community is now putting the Boeing Block III Super Hornet through its paces, the CMV-22B Osprey is proving itself ahead of first deployment, and the first TH-73 training helicopter entered service in June. The latest edition of this popular yearbook features all of these new types and is packed with reviews and analysis of the two services air power in 2021.