■Fin failure

If the fin straps are broken or the fins are dropped in the water, you will not be able to do a normal fin kick.
In such a case, change the fin kick method to ascend.
Lightly put the finless foot on the finned foot and swim slowly and large like a dolphin kick, or focus on the finned foot and swim while balancing with the other foot.

Swim on one leg

■Mask failure

If the mask strap breaks, a large amount of water may enter the mask. In such a case, hold the mask firmly with your hand to prevent water from entering, and ascend.

Practice putting your face on the washbasin without a mask and breathing only with snorkel so that you can calm down and breathe underwater without a mask.

Practice enough to breathe without a mask