Beach at sunset

First attempt at posting to a gallery so here goes....
Shot this on a 1940 Voigtländer Bessa RF on Ilford Delta 100 (120)

 

What's the mark on the right of the horizon..............??

 

I think it's a slight lens flare from the sun, it doesn't appear in any of the other shots from the same roll

 

Seascapes are tough, I think I would have cropped the right third. But it is hard to judge on a kindle screen.

Thanks for posting.

 

Yes probably I should have cropped or fixed it in some way but I kinda wanted to present it in it's raw form with the full aspect.
Thank you for your thoughts