1.screw log - a cigar-shaped log with rotary fins that measure the ship's speedpatent log, taffrail loglog - measuring instrument that consists of a float that trails from a ship by a knotted line in order to measure the ship's speed through the water
screw log
noun
Synonyms for screw log
noun a cigar-shaped log with rotary fins that measure the ship's speed
screw log - a cigar-shaped log with rotary fins that measure the ship's speed