Zemlesos 20

Built by order of a Chinese company
08.1938 passed sea trials with test soil sampling
01.1939 delivered to the customer, but not released due to the German embargo on exports to China due to the Sino-Japanese War
07.22.1941 temporarily accepted into the German Navy and began work in the Great Belt
At the time of construction, it was the largest dredger in the world!
4450 ihp / GRT 5761 tn/ NRT 2249 tn
History:
12.1941 returned to Danzig and declared a German trophy
01.1943 The Japanese Ministry of Foreign Affairs sends Germany a request to transfer the dredger to Japan, but is refused due to the impossibility of transporting the vessel to Japan, reasons: military operations and a difficult situation with fuel and supplies for the transition
16.08.1943 transferred to Kiel, where it was used as a command center and warehouse for the Luftwaffe (German Air Force)
08/22/1944 returned to the German Navy, Luftwaffe control center abolished
01/1945 transferred to the Gulf of Greifswald, where it sank on the river Wisla.
1949 Salvaged by the USSR and towed to the Leningrad for rapairing.
1952 arrived in Odessa and transferred to the CHERNOMORTEKHFLOT and was sent for dredging the Nikolaevsky Canal
1953 began work on the Kherson Canal, then on the water area of the Nikolaev port and other facilities.
20.03.1956 arrived in Vietnam for dredging in the port of Haiphong.
15.05.1958 returned to Odessa and continued to work at the facilities of the Black Sea basin.
1959 was transferred to the CHERAZMORPUT and continued to work in the Black Sea basin.
The whole of 1973 was under repairing by SRZ-1 (Odessa).
18-23.11.1975 equipment dismantling.
24.11 - 15.12.1975 decontamination, readout and preparation for decommissioning.
From 16.12.1975 used in the Ilyichevsk port for cleaning ships.
Scrapping date unknown.

Source:https://shipstamps.co.uk