Inaccurate?

Float

(Frostburn)

Transmutation
Level: Sorcerer 1, Wizard 1,
Components: V, S, M,
Casting Time: 1 standard action
Range: Long (400 ft. + 40 ft./level)
Target: One Large or smaller creature or object
Duration: 1 min./level
Saving Throw: Fortitude negates
Spell Resistance: Yes

The target gains buoyancy and can float on water for the duration of the spell.
It cannot swim below the surface of the water.
Creatures that must breathe water can still do so, but cannot swim under the surface.
If the target is underwater at the time this spell is cast, it rises toward the surface at a speed of 30 feet.
Material Component: An ice cube dropped into water.