I noticed by skimming through the ship recognition manual several Merchants, which entries that are very similar (and identical from the picture):
Tug Boat:
Mast: 21,4m vs. 21,5m
Draft: 4,6m vs. 4,5m
Large Tanker:
Mast: 28,0m vs. 26,8m
Draft: 11,7m vs. 11,9m
Is that intentional? How would I differentiate them in bad weather through the UZO?
Mark