Convert local time to UTC given zone description / longitude - the basis for navigational time-keeping and chronometer corrections.
Formula
$$ UTC = LT + ZD $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $LT$ | Local time | h | ship bridge clock |
| $ZD$ | Zone description | h | lat/long or national rule |
Sources
- Bowditch Pub.9 Ch.19.