That time when a Singapore Navy submarine caught a U.S. Navy aircraft carrier off guard

It has long been rumored that a U.S. Navy aircraft carrier group was successfully tracked by a Singapore Navy submarine in South China Sea. The photo of the carrier coming into the periscope sights has now surfaced in a video by the Republic of Singapore Navy.

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Screen grab from RSN video

The silent hunter was RSS Chieftain, a Sjöormen-class submarine that previously serve as HMS Sjöhunden in the Swedish Navy. Sold to Singapore in the 1990s, the submarine took the picture back in 2002.