Mariner III is a custom motor yacht launched in 1926 by Winslow Marine Rail & Shipbuilding Co..
Mariner III measures 37.20 metres in length, with a max draft of 2.70 metres and a beam of 6.09 metres. She has a gross tonnage of 179 tonnes.
Mariner III has a wood hull with a wood superstructure.
Mariner III accommodates up to 12 guests . She also houses room for up to 6 crew members.