Related Clues:
- Towards the stern inside, they stay on top
- On the surface, even five hundred of them may not get to the final version
- At last they're fast and stay on top
- Travels like Huck Finn
- Canyon carriers
- Balsa vessels, e.g
- Whitewater carriers
- Bundles of logs, maybe
- Molten flows
- Flat vessels
- Dangerous streamers
- Aa and pahoehoe
- Flat floating structures
- Volcano emissions
- Crowds lifeboats