Whats the smallest acceptable size for the logo on the Web?
Any size is acceptable as long as a viewer with average vision and an average-resolution monitor can read it. The limiting factor is the on-screen legibility of the program component name you choose to place in small print underneath the “Sea Grant.” If you can’t easily read it, the logo is too small. If you need a very small graphic, consider using the generic version of the logo—just the bird and “Sea Grant” with no program name below—and add the program name elsewhere or in HTML text.