Hello ,
Woerden 7 could be rown, seats attachments, and imprints (wear) by oars.
[www.woerden7.nl] in Dutch, under links:

[www1.rgzm.de] This will be time consuming!

These barges were used in estuaries, tidal systems, so you can go with the flow.
Makes me think of Homer about the breathing of Okeanus.

Best regards,
Bart