This is the wreck of the Eduard Bohlen, a German cargo ship which ran aground in 1909.
The Namib Desert is over 1200 miles long and covers an area of over 31,000 square miles. Funnily enough, 'Namib' means 'vast place'.
The constellation Crux, or the Southern Cross, is a star formation always visible in the southern hemisphere and used by sailors for orientation, just as the North Star is used in the northern hemisphere. How Jeremy knows any of this is, frankly, a mystery.
The original 1964 beach buggy James refers to is the Meyers Manx, created in California by Bruce Meyers as a more stylish version of the traditional dune buggy, and using a Beetle chassis because the rear-mounted engine gave better traction on sand.
Jeremy's beach buggy is built around a shell design called 'Sidewinder'.