What is "handpump"

Usage examples of "handpump".

A dozen of the forty little green men aboard manned handpumps every hour they were conscious, pumping out the bilge and lower decks, and Mahnmut worked alone on a pump through the long nights.

There wasn't a camp stove to be had, but the clerk knew Harvey and obligingly fetched out four handpumped flashlights and two Coleman lanterns that had just come in, along with four gallons of Coleman fuel.