MARINE.
airlinespotting.com

All the uploaded images will be cropped for display to 1600 x 900 pixels.

   Therefore, they must have:

    - minimum 1600px wide.
     - maximum size 5Mb.
     - only jpg format.

Furthermore,

   -photos must be of passengers ships of regular lines(ferries) or tourism cruise ships.
   -no pictures of small boats and fast-ferries were accepted.

Otherwise, it looks just enough sharpness and clarity.

Only if your photo is elected to be part of this database, you will receive an e-mail thanking your collaboration and next up telling Vesselspotting.com publication.