Chao Phraya Express Boat Orange Flag is a popular express passenger boat for the working population to commute to work during rush hour in Bangkok.

The engine room, in the appearance of a large wooden box, is inboard in the center line of the boat in front of the seating area.

This design has been applied to all other boats that are being built in the company's shipyards in Bangkok and Ayutthaya.

Unlike the single-screw boat, the boat driver sits in a small pod above the passenger deck, similar to a cockpit on board a Boeing 747 airliner, giving view for passenger in the front-most row and public access to the boat's front deck for passengers who desire to watch the view from the boat's front without any obstruction (except for the Thai national flag).

The engine rooms are placed lower than those in single-screw boats, and some passengers prefer to sit on them when it is crowded.