5 /5 Supriya Reddy: The museum is very small. Heritage chamber, To the left of entrance, is used for community events, concerts and educational programs. Research library is open on Tuesdays noon- 4pm. All other days its only by appointment. Every 3rd Saturday of the month is free. Restrooms are on the lower floor and second floor( we used these. They are separated for both genders and the Ladies restroom is so beautiful with the sitting area outside the restroom). Periscope offers the Panoramic view of the city and Mare Island when rotated. Second floor has an auditorium and artifacts from the ships. The Captains cabin on the the lower floor is beautiful. We were excited when we saw the old manual telephone exchange and cylinder talking machine.