Lateen sail and glasses: what they have in common

1. Step 1. Lateen sail — is part of — Caravel. Lateen sails.
2. Step 2. Caravel — is a kind of — Sailing ship. A sailing ship.
3. Step 3. Sailing ship — has part — Sextant. The sextant and chronometer were a sailing ship’s navigation kit for finding latitude and longitude.
4. Step 4. Sextant — has part — Lens. The sextant’s telescope.
5. Step 5. Lens — is part of — Glasses. Lenses.

Open Evothings