Assuming that the nation is not landlocked, there will be some issues to address with regards to water. There is freshwater, and sea water. fresh water will include lakes, and rivers where as sea water is the ocean or a sea. In either instance, there is some need to consider with regards to transit, and traveling.
In the case of freshwater – there will be river boats, and docks that would be considered as public transit. With that said, these routes will likely be in the 90 range. The advantage of river trasit as opposed to land transit is there is a much less likely chance of traffic which will always be a concern on public roadways. With that in mind, river boats might make the most sense to be used during rush hour services. Private boats are allowed on the river, but if they are on the river all year round, they must have a dock that they call home. If the boat is a houseboat, then the dock owner must provide for affordable solutions for the docking of said boats. This could be done in the case of a lease. However, houseboats will be the exception rather than the rule, and will likely not have an address which means they will have to use a PO Box, or PMB.
Sea water transit is likely to be handled by private companies who might acquire cruise ships. Since vacation cruises is not considered as an essential resource, the government will just regulate the system, and not operate it.