Reciprocal bearing calculation.
Quickly finding the reciprocal of your course or a bearing can be useful.
If you struggle with the maths, there is a simple short cut. Instead of adding 180 degrees to a bearing try adding 200 then subtract 20.
E.g.
| Bearing | 127 |
| Add 200 | 327 |
| Subtract 20 | 307 |
| Bearing | 323 |
| Subtract 200 | 123 |
| Add 20 | 143 |
Most people can handle adding and subtracting 2 much easier that 180!
Sailtrain.co.uk is free to use, but if you feel you would like to contribute to the running and development costs you can donate via Paypal:
