The altimeter instrument is at the middle top of the instrument panel. The long needle shows hundreds of feet, the short needle shows thousands of feet. The altimeter represented in figure 8.15 shows an altitude of 800 ft, i.e. approximately 245 meters.
Are you positively sure, it is a 800 feet? And not, say, 2830 feet?
Also, shortest needle is not mentioned.
It should be then like "The long needle shows hundreds of feet, the medium needle shows thousands of feet, the short needle shows tens of thousands of feet. The altimeter represented in figure 8.15 shows an altitude of about 2800 ft, i.e. approximately 853 meters. ".