Cutlery relocation
Cutlery relocation (BV) is a term used in nautical and navigation . According to DIN 13312, it is one of the “terms that are important for travel” and describes the vector from the coupling location (O k ) to the observed location (O b ) at the same point in time. Conforming the abbreviation BV is used when using polar coordinates, the direction refers to pointing right Nord. If Cartesian coordinates are used for the BV K cutlery relocation , the vector is broken down in the direction of the course line and perpendicular to it. An example could be: +1.6 nm ; 2.1 nm dc.
Example from seafaring
A ship is at the position 50 ° 00 N, 002 ° 00 W at 12:00 noon. The ship intends to sail north (360 °) for 30 minutes at a speed of 12 kn . In purely mathematical terms, the ship's O k 1230 should be at position 50 ° 06 N, 002 ° 00 W. In fact, the ship can be found e.g. B. on the O b 1230 50 ° 05 N, 002 ° 01 W again.
The distance from the O k to the O b , i.e. the cutlery offset, is 1.2 nm in this case and lies in the direction of 213 °.
Notation
In the example above, the cutlery offset would be written as follows:
BV 1230: 213 °, 1.2 nm
Reasons for moving cutlery in the sea
There are several reasons why a cutlery offset occurs in the navigation:
- Unknown flow ( BS ). The current moves the ship in an unknown direction at an unknown speed.
- Unknown wind offset ( BW ). The ship is pushed away from its course by the wind.
- Tax error. The vehicle is not steering the planned course.
- Speed error. The ship is faster or slower than expected.
- Calculation error. A mistake is made in calculating the O k , e.g. B. by incorrect time information.
Use in shipping
The calculation of the cutlery offset is necessary in order to reconstruct an actual course in the past that takes into account the aforementioned factors or partial aspects thereof. This allows causes or a cause for the agreement from the planned course to be traced.
In the example above, e.g. B. a flow of 213 ° at a speed of 2.4 kn have led to the cutlery relocation, if all other errors can be excluded.
See also
Individual evidence
- ↑ - ( Memento of the original from January 5, 2012 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. SKS questionnaire on www.elwis.de
- ↑ Dietrich v. Haeften, Harald Schultz: Sportseeschifferschein. Delius Klasing, Bielefeld 2010, ISBN 978-3-7688-3186-4 , p. 26.
