A designated swimming area, for one.
There are many restrictions such as naval ranges for instance
how does the area of the sail affect how a model boat sail
Sail is a sheet of material used to propel a boat. - Or to move on the water in such a boat.
The larger sail area causes a larger foil to pull the boat faster.
Water, Rivers, Lakes, Oceans
A sail boat or yacht.
Displacement Sailboat
By overcoming the resistance of the water by some means of propultion.
The carvel is a boat that can float in shallow water and can sail fast
Deep
You need all the senses. (eg. sight,smell), a boat, a sail, some water to sail in would be good, a tiller, a rudder, and some wind would be useful too.
A sail boat Also motorsailers and rafts