Screw
Flag
Company
Country
Baggerbedrijf (dredging company) De Boer, Sliedrecht

part of a scoop or some other dredging utensil
Netherlands
Dredging International N.V., Zwijndrecht

white flag, 6 black dredging scoops forming a turning circle

Belgium
Noås Industri A/B. Sweden
Hanseatische Motorschiffahrts-

AG

 Germany
ScanDutch

ScanDutch I/S (Copenhagen)

white flag, red rotor with three blades.
Netherlands

Denmark
Island Mariner US
Williamson & Co.

white flag, red propellorscrew with 4 rotorblades.
Hong Kong
Cenargo Navigation Ltd., London
UK
Promotie Binnenvaart Vlaanderen

Flemish Inland Navigation Promotion Office
Belgium