A-B tasks
Orientation tasks in which two map points A and B must be connected by the shortest permitted route.
A-B tasks are a classic form of orientation rallying. Two points, A and B, are marked on a map extract, and the crew must find and drive the shortest permitted connection between them. What counts as permitted is defined by the organiser – for example, whether only certain types of road may be used.
Often several A-B tasks are chained together: the end point of one task is the start point of the next. In this way the whole route is built up from many short connections. The appeal lies in map reading and in cleanly determining the shortest connection. Misread a junction and you drive a detour, collecting penalty points at the controls.
Glossary from A to Z
Related terms
Orientation rally
Event format where finding the correct route from tricky roadbook instructions matters – not speed (often abbreviated Ori).
Grid reference
A map coordinate (Ordnance Survey grid) used as a navigation instruction in British rallies: the navigator plots the given point or route from it onto the map.
Ingetekende lijn
A Benelux navigation system: the route to be driven is pre-drawn on the map as a continuous line and must be followed as accurately as possible in the forward direction.