Boat Swimming In The Sky

Boats can be categorized into three types:
- Unpowered or human-powered boats. (Unpowered boats include rafts and floats meant for one-way downstream travel. Human-powered boats include canoes, kayaks, gondolas and boats propelled by poles like a punt.)
- Sailing boats, which are boats propelled solely by means of sails.
- Motorboats, which are boats propelled by mechanical means, such as engines.