There are screaming horses in the song IIRC.
The song refers to the still latitudes where sailing ships became calmed to the point that they would drive the horses they carried overboard to save water.
Horse Latitudes
When the still seas conspire an armor
And its currents breed tiny monsters
True sailing is dead
awkward instant and the first animal is jettisoned
Legs furiously pumping their stiff green gallop
And Heads pop up
Poise, Delicate, Consent
In mute nostril agony
Carefully refined and sealed over.
Might not be all there -I did that from memory, believe it or Not.
I listened to too much of this Stuff - I may remember all the lyrics to the Soft Parade still.🥱