1. Hand Signals. During every dive, hand signals are crucial. When you want to dive, you should first give a diving signal to your dive buddy, which is to make a fist with your thumb pointing down, indicating it's time to prepare for the dive.

2. Direction. Before you dive, it's crucial to know your location and establish a navigation direction for the dive, which will assist you in finding your way back to the surface. Therefore, find a fixed object on the surface or land to orient yourself before diving, as this will help you identify your position upon surfacing. And don't forget to inspect underwater structures to avoid diving onto beautiful, delicate coral or injuring yourself.

3. Regulator. At this point, you should switch the breathing tube with the regulator. Prepare the regulator, which is when the drainage is about to occur.

4. Timing: Before diving, we must confirm the start time, as we need to calculate our dive duration and ensure it falls within the limits of the recreational dive plan.

5. Ear equalization and diving. The final step is to perform ear equalization with your left hand. Don't forget this, or your ears may become very uncomfortable due to pressure, and in severe cases, they could be damaged. Remember not to force it too hard during ear equalization! Next, with your left hand, release the BCD gas, start exhaling, and slowly descend.

Many might wonder why it's challenging to descend even when using the correct weight. A recommendation for underwater recovery operations is to remember to stand during your next dive. This helps expel air from your BCD (Buoyancy Compensator Device), so in addition to exhaling, make sure to fully expel the air to easily descend slowly.