So, while traveling between Hong Kong and Macau, visitors will need their passport.
During our last trip to Hong Kong, we decided to visit Macau which is only an hour away by turbojet like this one. There is a turbojet leaving every 15 minutes so you can purchase your tickets at the ferry terminal. If there is room, you can catch an earlier turbojet even if your ticket is for a later departure.
If you have never seen a "flying" boat, take a look at this video I found on Youtube.
But, don't let the fancy seats fool you. Each seat is outfitted with an airsick bag as countless riders got seasick during the short 1 hour "flight" as they were continually showing food programs on the large video screen in front of them.
It was not an enjoyable trip as I got queasy just hearing others get sick around me. My suggestion is to sit in the back of the boat which appears to be less bumpy.