taffrail log


Also found in: Thesaurus, Encyclopedia, Wikipedia.

taffrail log

n.
See patent log.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.taffrail log - a cigar-shaped log with rotary fins that measure the ship's speedtaffrail log - a cigar-shaped log with rotary fins that measure the ship's speed
patent log, screw log
log - 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