If you've been in the San Francisco Bay Area recently, you might have spotted a giant airship adrift over the Golden Gate Bridge. It may look like a blimp – like the kind used these days for advertising – but it's much bigger.
The huge airship recently spotted in California is the Pathfinder 1, billed as the "largest aircraft in the world" and developed by the company LTA Research. Clocking in at 406.5 feet long and 66 feet wide, the Pathfinder 1 is among a class of airships known as "lighter-than-air" or LTA aircraft. For comparison, a Goodyear blimp is 246 feet long.
LTAs include blimps – such as the famous Goodyear blimp that celebrated its 100th anniversary in 2025 – but also balloons and powered airships.
Pathfinder, which is notably not a blimp, aims to differentiate itself from an era of poor public perception that dates back to the 1937 Hindenburg disaster. Its development and testing around the Bay Area poses an interesting question for the future of airships, said J. Gordon Leishman, a professor in the aeronautical engineering department at Embry-Riddle Aeronautical University.
Airships would have to compete with more established methods for transporting cargo or people to have a viable future in the industry, he said, but they have some advantages that could make them useful.
