Japanese oil tanker Tofuku Maru used for refuelling tuna fishing ships according to the Commercial Fisheries Review dated September 1964 No. 9

An item reported that the Japanese oil tanker Tofuku Maru (1,983 gross tons) left Japan on 13 May 1964 and refuelled until mid June on the ocean 23 tuna long-line vessels supplying each vessel aound 50-100 kiloliters oil, 10 tons drinking water and provisions. Planned was to refuel another 20 tuna vessels before leaving on 13 July towards Balboa, Panama to purchase fuel and provisions.