"Dear Guests, we kindly inform you that the following measures to prevent the spread of the COVID-19 are currently observed inside the branches of the National Maritime Museum in Gdańsk:

2-metre minimum distance between unrelated visitors,
hand disinfection,
wearing a mask over mouth and nose.

Organized groups of 15 persons maximum are allowed.

Maritime Culture Centre:
the maximum number of persons allowed in the Maritime Culture Centre – 75 (25 in the interactive room),
the “People-Ships-Ports” interactive room sessions last 45 mins; hand disinfection and wearing protective gloves is required (gloves are provided upon the entrance),
some of the devices on the exhibitions: “People-Ships-Ports” and ‘Ships. Our Passion” are out of order due to COVID-19 restrictions."

https://nmm.pl/en/restrictions-and-limitations-inside-the-branches-of-the-national-maritime-museum-in-gdansk/