From the announcement:
The 3rd Annual Man Battlestations Painting Contest Has Begun! Entries can be of any naval subject, and can be submitted through the MBS forums. All submissions are due by Friday, 03 April. Additional details can be found in the Official Rules Thread.
The last two years have seen some truly beautiful submissions, and I can't wait to see what this talented community comes up with this year. Good luck and happy painting!