well being a rower myself, rowers need balance to keep their boat steady, so it doesnt tip. this is obtained by squaring your oars, sitting up straight and resting the handles one on top of eachother.
You will need a water rower if you are wanting to practice for outdoor rowing, but in an indoor setting. The other uses include just for general fitness, if you prefer the real rowing experience.
Rower
Henry Proctor - rower - was born in 1929.
Anne Warner - rower - was born in 1954.
Charles Penrose - rower - was born in 1816.
Charles Penrose - rower - died in 1868.
Josef Schneider - rower - was born in 1891.
Josef Schneider - rower - died in 1966.
Yu Hua - rower - was born in 1981.
Dick Lyon - rower - was born in 1939.
Bruce Logan - rower - died in 1965.
Bruce Logan - rower - was born in 1886.