Some aquatic plants, like water hyacinth, have swollen petioles that act as floats. Many form floating mats which block water ways and are serious weeds e.g. Salvinia and alligator weed.
The holdfast.
Stationary mean "not moving" so it must mean the the position is not moving or stay the same place.
The ability to maintain equilibrium when stationary or moving is called balance. It relies on input from the sensory organs, including the inner ear, eyes, and proprioceptive receptors, to help the body adjust and stay stable. Good balance is essential for everyday activities like walking, running, and standing.
Seaweed
A stationary front. Stationary fronts end up moving or dissipating.
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Geo stationary satellites are man made objects sent up into space that orbit the Earth parallel with and in the plane of the equator. They are sent up into space so that their distance from the Earth and hence their orbital speed matches the speed with which the Earth rotates on its axis. This means that they maintain a constant "stationary" position over a point on the equator of the planet. This is useful for communications and earth observation purposes.
A standing wave is also known as a stationary wave. It is a wave that remains in a constant position. This phenomenon can occur because the medium is moving in the opposite direction to the wave, or it can arise in a stationary medium as a result of interference between two waves traveling in opposite directions.
motion can be observed from any position
The orbits never change their position...