Use a marker or surface buoy. Stop 10 feet under and listen for traffic. You just have to ask, how many have been killed or injured under the water scuba diving. With any scuba incident, if the surface is available, that’s the place to be. It’s always better to blow the deco than to drown doing it.I tend to think you also might stand a better chance of being rescued if you are on the surface.
The only serious surface incident I ever read about which really scared me was with Kirsty Maccoll. Absolutely insane stuff. Kirsty MacColl - Wikipedia