Just stumbled across this. Of course this meets the challenge.
Who couldn't see the PLIMSOL LINE?
I thought of photographing one, but the coast is far, far away.
Lovely serene image.
Hmm... This image's lines could be interpreted in many ways, and I'm not sure what you've been thinking of whenyou made it. However, the central part of the image is almost black, and not black enough to make a silhouette. It'll be interesting to see what you've thought of with this image.
This is a stunningly nice image that only marginally, IMO, adresses the challenge. It's too nice not to give a good score to, since the diagonal pole does add a strong line element. Hellof a nice shot.