The collection contains 127 items, most of them donated to the museum. It comprehends tables showing ensigns of the maritime states, a box with bearings for pennants, flags of the shipping companies of the Dubrovnik region, flags of the Yugoslav shipping line, and signal flags and pennants that date from the 19th and 20th centuries.
The permanent display shows a flag with the depiction of St Blaise and a table with depictions of flags from 1804.