How is a closed okay performed in diving communication?

The correct approach to signaling an "okay" in diving communication is performed by making a fist. This represents a standard way to convey that everything is fine or that no issues are present. In the underwater environment, divers rely heavily on a series of hand signals to communicate, as vocal communication is often not feasible due to the sound absorption properties of water.

Making a fist is a universally recognized signal among divers, denoting that the diver is comfortable and that their situation is stable. This signal is not only practical but also helps maintain clarity in communication, especially in environments where visibility may be limited.

Other choices do not effectively convey the idea of being okay. Keeping a hand open typically conveys different meanings in diving communication, and simply using a hand signal without specific context can lead to misunderstandings among divers. While vocalizing clearly underwater could be attempted in certain situations, it is ineffective for practical communication due to the difficulty in hearing and being heard underwater. Thus, making a fist remains the correct and widely accepted method to signal an "okay" status.