Calling a dive sounds simple until you're the person doing it. Your buddy has traveled to the site, everyone is geared up, and the plan is underway. You might be uncomfortable, unusually tired, or simply feeling that something isn't right. None of those concerns seems particularly dramatic, which can make speaking up surprisingly difficult.
But the decision doesn't require a convincing explanation. If you want to end the dive, that's enough. Your teammates don't have to agree with your reasoning, but they do need to respect the decision.
Call It Before a Small Problem Becomes a Big One
Not every reason to end a dive involves an equipment failure or an obvious emergency. Fatigue, anxiety, deteriorating conditions, difficulty equalizing, or an uncomfortable feeling you cannot quite explain are all legitimate reasons to stop. You don't need to continue until something becomes serious enough to justify your concerns.
Underwater, get your buddy's attention and signal that the dive is over with a thumbs-up. Confirm acknowledgment and make a controlled ascent together, following any necessary ascent procedures. On the surface, telling your buddy you're finished should be enough.
Three Dives I Called, and One I Nearly Did
During my first 50 dives, I called three dives and nearly called a fourth. None produced the negative reaction I might have worried about.
At Three Oaks, I finished the first dive of a planned two-tank day and simply didn't feel right about doing another. I told my buddy I was finished, and that was that.
At Pearl Lake, my buddy was diving doubles with an additional AL80. We'd planned for me to surface, change cylinders, and rejoin him, but when I reached my turn pressure, I decided I was finished. I signaled the end of the dive, and we surfaced together.
The third time, I didn't even leave home. I woke up with a slight sinus and ear issue and cancelled the day's diving before we got in the car. There was no reason to gamble on feeling better once we reached the water.
The fourth was different. On the final day of GUE Fundamentals, I was mentally and physically exhausted and seriously considered stopping. I spoke with my instructor, who made it clear that the decision was mine and that she'd support either choice. I ultimately continued, and I'm glad I did.
What mattered in all four situations was that nobody pressured me. My buddies accepted the decisions, and my instructor gave me the freedom to make my own judgment. That's how diving partnerships should work.
Supporting Someone Who Calls the Dive
If your buddy calls a dive, acknowledge the decision and help them exit or ascend safely. Don't argue, negotiate, or make them justify themselves, particularly underwater. There may be something worth discussing afterward, but that conversation can wait until everyone is safely back on the surface.
This is what psychological safety looks like in practice. A team can say that anyone is free to end a dive, but the promise means very little if the person who actually does so receives criticism, sarcasm, or pressure.
I've been fortunate to dive with people who respected my decisions. I intend to give them the same consideration, and I expect it from anyone I dive with.