About the Downtown Cruise Ship Berths. Juneau has two cruise ship docks located in the downtown waterfront. There are also two private cruise ship docks in the area. Together they serve nearly 1 Million passengers a season (May through September).The current city owned docks provide berthing for one ship up to 800 feet in length and one Panamax ship up to 1,000 feet in length.he current city owned docks provide berthing for one ship up to 800 feet in length and one Panamax ship up to 1,000 feet in length.