That's the third destroyer I've lost to an ironclad today.
Life's too short, back it up.
Make sure you save your work as a straight text file with the .TXT extension. Rolling your own graphics is a horse of a different feather. It is widely available for download on most online services as shareware. Reducing digitized images to use as units is a problematic process. By the time the graphic has been brought down to the correct size it is a mush of pixels only vaguely reminiscent of the original photo.