Below is a chart of the nautical flags and pennants, that will allow you to decode the signal flags found between the smokestakes on Min & Bill's Dockside Diner above.

The insignias over the S.S. Down the Hatch alternate between flags and pennants. The flags represent letters, the pennants represent numbers.

The letters spell out
D-O-C-K-S-I-D-E-D-I-N-E-R
and the numbers are
782562896354.

I'm not a cryptographer, so I have been unable to determine what they signify. So if any Imagineer's out there know the significance of these numbers, please let me know.