Determining Longitude Using an Accurate Clock (cont.)
- Example Data:
- The HMS Beagle sailed with 22 chronometers to provide
redundancy and error correction
- In June of 1837, the chronometers were set to 12:00 at
local noon at the prime meridian
- On November 15, 1837, the average time on the working chronometers
was 19:45
- Calculations:
- Time Difference: 7 hours and 45 minutes (i.e., 7.75 hr)
- Longitude: 7.75 hr \(\cdot\) 15 deg/hr = 116.25
(i.e., near Perth Australia)