Suggested Alternate School: Transmutation
Sor/Wiz 6

As Scattercalm, but the penalty increases to -4.

Concentration checks (for spellcasting, etc) will now be required for people aboard ships and in the water, or they were already required, they have a -5 penalty.

This spell has no effect on a body of water that is less than 80 feet in every dimension, or less than 5 feet in any dimension.

Greater Scattercalm counters and dispels both Scatterwave and Greater Scatterwave.

All or part of this spell is open game content, as described here.