- The Japan Society of Naval Architects and Ocean Engineers
- 造船協會會報 (ISSN:18842054)
- vol.1938, no.62, pp.77-90, 1938 (Released:2007-05-29)
“Sumiyosi Maru” is the first Diesel-electric tug built in Japan, of which the speed control is of Ward-Leonard system. That was designed and equipped at Kawasaki Dock Yard Co., Ltd. for their own use. That was, also, equipped with as power plant to supply electric power for electric welding and compressed air to ships in harbour.The descriptions of hull, propelling machineries, power plant, trial trips and towing tests are successively set forth.