Safety during your dive is always the most important part. This is why you do the buddy check and dive within the No decompression limits and within the depth limits of your certification. You might even bring a Surface Marker Buoy with you to raise before you ascend at the end of your dive, like you have learned during your Open Water course
In some countries, like here on Curaçao, a SMB is not enough. You have to be visible during your whole dive or snorkel tour. A very nice item to buy and take on your next dive vacation, to ensure more safety during your dive is the Pocket Buoy, as shown in the movie. Light weighted, easy to carry with you and easy to use.
Now also available at Relaxed Guided Dives, so come and get yours before stock runs out!