There are several ways to determine the observed location:
- Terrestrial navigation:
- Electronic navigation:
- Position information of a satellite navigation system
- Astronomical navigation:
- Position finding through astronomical navigation
The observed place always relates to a specific point in time and is indicated as follows:
O b 1200: 50 ° 12 N, 002 ° 01 W.
Use in shipping
The determination of the O b is used to determine the position of a ship. The further journey can be planned from the O b , or the route covered so far can be checked. It also serves to determine the cutlery offset in relation to the coupling point .
- Dietrich v. Haeften, Harald Schultz: Sportseeschifferschein. Delius Klasing, Bielefeld 2010, ISBN 978-3-7688-3186-4 , p. 136.