The best time to visit is during the late afternoon or early evening to avoid the heat and to enjoy a pleasant walk along RK Beach. Visiting during weekdays can also help you avoid the crowd.

Photography inside the submarine is generally restricted. However, you can take pictures outside the submarine on the beach. It's best to inquire with the staff about the current rules on photography.

Yes, there is an entry fee for the museum. The fee for adults is usually around ₹50, and for children, it’s ₹25. Prices might change, so it’s a good idea to verify before going.

The museum is generally open from 2:00 PM to 8:30 PM on weekdays, and from 10:00 AM to 12:30 PM and 2:00 PM to 8:30 PM on weekends and public holidays. However, it's advisable to check the timings before your visit as they may vary.