As a followup to “Mystery Tugs,” here’s a few more. My favorite, below, could be called the naked tug: controls under an awning, slant mount engine, a welding unit, and the hook. Last chance to guess the location and river: a clue is that its name means “river of kings” and previously locals referred to it as Menam.

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A passenger vessel cuts close to a tug with an unlikely portside door, and what hangs over the engine compartment?

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Laundry and more laundry.

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So, all these tugs operate on the Chao Phraya, flowing through Bangkok, where Richard lives and  Conrad set such works as Typhoon, Secret Sharer, and Falk, a novella about a tugboat captain.