Lock times in germany

So we had a bit of a late start and by the time we had tossed the coin, decided we were going to stay in Germany and head downstream in the Ems River (going north) and topped up with water, we didn't leave until about 1100.
First lock, no problems however we did ask what time are the locks open until.  On a Sunday, 2pm.

Anyway, cutting a long story short, we ended up staying at the side of the river because we got there right on 2pm.  Meant I had plenty of time to walk around in the afternoon and look at the other side of the lock which was undergoing maintenance.  No idea what maintenance they were doing.

(I've just noticed a problem with the dates in Google photos.  Because sometimes I've been a bit slack in keeping the blog up to date I rely on the date time stamp in the photo to manually set the date of the post.  Now I see that the date of the photo is not necessarily the time the photo was taken but really the time that the photo was synced back to google.  Normally the same but not in this case.)

This photo below that I edited is the most interesting.
From the top of the yellow it is roughly in thirds.  The top third is normally out of the water, the middle third is the water range and the bottom third is always under water.  When we come in we tie up at two of the circled points one with Belinda at the front and one with me at the rear.  As we move up or down we will probably also need to move the line.