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-- 18:35, 13 February 2012 (UTC)
Welcome, indeed. You already found that I changed your contributions a little bit. Realise that we have a certain way of categorising and it is very useful to read the heading of the Category:Ships by name and Category:Ships by IMO number. Convention is that an IMO (capitals) number is given for each category by name. Images of ships (very welcome, I myself specialise in Dutch and German barges) are to be categorised under their name with date of completion or first commissioning. The Name category contains an IMO number, the IMO number, if found, the shipyard. If you don't know where to add an image, please use Category:Ships, because there we find them and do the work. --Stunteltje (talk) 20:33, 14 November 2012 (UTC)
Please read the categorising instructions first, as you are adding Category:Tugboats to images of categories that already are categorised as tugboats. That is against the convention here and overcategorising. --Stunteltje (talk) 09:10, 25 November 2012 (UTC)