River navigation ☊ 
Flussschifffahrt ☊ < 8.14 Schiff Navigation ☊ Navigation ☊ < 8.15 Flugzeug Circumnavigation ☊ Weltumseglung ☊ < 17.20 Wassersport Navigation System ☊ Navigationssystem ☊ < 19.21 Fahrzeugtechnik | Vie | Eng | ||||
|---|---|---|---|---|---|
| Eng | Top | Subtopic |
|---|---|---|
| navigation | Travel and tourism | Travelling by boat or ship |