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Divers are taught on courses that they should not dive when they are ill. However, sometimes someone may feel unwell during a dive. If you are able to quickly and effectively show that something is wrong, your partners can help you and take more precise action.
Underwater, it is difficult for a diver to convey the message that he has suddenly felt unwell, so he may simply show the signal to end the dive. His partners do not know what has happened and may lose valuable time in finding out. They may also, even worse, ignore accepted practices and send the diver back to the surface alone.
Accident reports show that divers can lose consciousness without warning, during ascent or shortly after ascent, which comes as a surprise to partners and crew on the dive boat. It later turns out (unfortunately sometimes during autopsy) that this person was suffering from a serious, often undiagnosed illness that was a contraindication to diving.
It is very likely that the diver suddenly felt very unwell and therefore simply showed the “end of dive” signal. In order to make the communication between the partners more precise in such a situation, a new signal meaning “I feel bad” has been developed.
This is the new standard signal to be taught on PADI courses. The diver positions his hand with the fingers pointing in his direction and “draws” a vertical oval shape at the height of his head and torso. In this way he shows that something is wrong with him and not with the equipment.

Example of use: the diver shows the signal “Something wrong”, followed by “I feel bad” and “We are ending the dive”.
This signal will be included in the PADI training materials when they are updated. Preparing a rescue plan and being able to communicate if a diver feels unwell underwater is another step to making diving safer.
Source: PADI bulletin 3/2020
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