Assertion: nautical mile | /r/HasProperty | 40.3 mph
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text: More recently, in 2005 the submarine USS San Francisco ran into an uncharted sea mount (sea mountain) about 560 kilometres (350 statute miles) south of Guam at a speed of 35 knots (40.3 mph; 64.8 km/h), sustaining serious damage and killing one seaman.