The first hour of the cruise does half the harbor, the boat returns to the dock, people board/disembark, then the second hour is the other half of the harbor ( north harbor and south harbor are the two halfās). There is about 15 minutes of downtime when people are getting on/ off between the two cruises.
For the best view, go to the top level and sit on the side.
Good value for the money as there are great views of the city, the Coronado bridge and the Navy base you canāt appreciate from land.
Bring a sweater or jacket - it was cool on the water!