In open areas and around vessel swim platforms, certain activities should be avoided. what activity should be avoided in order to keep away from carbon monoxide

In order to avoid carbon monoxide poisoning in an open areas or / and around vessel platform, especially when boating, it should be that swimmers will not be allowed to enter any enclosed area under the swim platform or dive platform even for a second. It is already an enclosed area for a given reason, and that one reason is to avoid being poisoned by carbon monoxide. Although not only because of carbon monoxide, surely the area is enclosed because of other reasons too. Carbon Monoxide is an odorless and tasteless gas, even colorless that will slightly kill not only people but to any hemoglobic animals. Which we all know, hemoglobin is present in every animal’s red blood cells, including humans.