• 1 · Religion and Magic
• 2 · Nature
• 3 · Human Being, Man in General
• 4 · Society, Civilization, Culture
• 5 · Abstract Ideas and Concepts
• 6 · History
• 7 · Bible
• 8 · Literature
• 9 · Classical Mythology and Ancient History

• Top
• 4 · Society, Civilization, Culture
• 46 · social and economic life, transport and communication
• 46C · traffic and transport
• 46C2 · traffic on the water
• 46C28 · navigation and manoeuvering ~ ship

46C282 · position-finding at sea; nautical instruments

• 46C2821 · position-finding with the help of the stars or the sun
• 46C2822 · quadrant, sextant, octant (nautical instruments)
• 46C2823 · astrolabe
• 46C282(+0) · position-finding at sea; nautical instruments (+ variant)