I have volume one (and have just purchased Vol 2) The Block Factory's come packed with patterns - most of them can be worked as templates or foundation piecing - and since Mariner's compass are notoriously tricky to draw up by hand, having software around to provide pre-printed (and sizeable!) patterns is a definite plus!
Website is at: http://www.quiltpro.com
Note that the Block Factory software doesn't need any of the other quilting software loaded to run - although I believe you can load the blocks into Quilt-pro itself if you want to include them in a bigger quilt design.
And, of course, a Mariner's Compass quilt would be a perfect project (or present) for a Pirates fan! *g*