Motor tug "Thalassa" was built in 1919 in Dordrecht as a steam tug with a Tripleexpansion compound steam engine.
brand number 1586 B Leid. in 1956 and Europe number 3031586.
Before the measurement, in the early 1950s, the entire upper deck superstructure was demolished, in order to remove the steam engine and install an old diesel stationary engine that came from a British submarine that was scrapped.
That is the current 5cylinder fourstroke "Lister Blackstone", type HP 168, number EPV 45388.
Good for 600 rpm and 200 hp.
Furthermore, the ship is equipped with a diesel generator 220/380 V, 10 KW.
2 air start cylinders and a compression pump.
2 cooling water pumps 1 for fresh and 1 for salt water and 1 deck wash pump with fire hose reel.
24 volt hydrophore, traction batteries for 24 volt and dynamo and separate charger.
2 fuel tanks of 2000 liters each and a day tank of 200 liters.
1 spare cast iron propeller on the port side deck deck.
In the 1950s, after installing the new engine, the current superstructure (front and rear cabin) was completely rebuilt with a teak wheelhouse and a captain's cabin and bathroom were made in the front. The bow and bow are largely classic with mahogany and the wheelhouse with teak wood.
In the early 1990s, the wheelhouse superstructure was replaced by a steel superstructure and was also completely redesigned with, among other things, a clear dashboard and new interior paneling.
In 1995 the ship was fully doubled up to the waterline. Many innovations were also made above deck in those years.