Vertical turbine (caisson) pump

ISO 10628-2 (group 15, liquid pumps) / PIP PIC001

Drawn as

A motor on top of a discharge head on the deck, with a long column running down into a caisson or sump and a stack of bowls (stages) and a suction bell at the bottom, below the water line.

Meaning

Line-shaft vertical turbine pump (API 610 VS1): seawater lift and firewater pumps on caissons. Becomes vertical-turbine-pump.

Variants

Diesel-driven firewater versions have DE instead of M (see the fire pump)
Simplified: a centrifugal pump symbol with a long dip pipe