Based on the commercial CV-240 airliner the T-29 entered service with the U.S Air Force in 1950 as a navigation and radar trainer. They were modified with several astrodomes in the top of the fuselage for the student navigators to practice celestial navigation. Two years later the improved T-29B introduced a pressurized cabin with accommodation for ten navigation students and four student radar operators. The T-29 remained in service until the mid 1970s.
U.S. Navy, Training Squadron 29 (VT-29), Naval Air Station Corpus Christi, Texas, 1966
Pima Air & Space Museum