The girls in the Breakwater Club learn how to float properly just in case they ever fall into the ocean. Later on, Hina goes to battle with a heron, but then notices it has a fishing line tangled around its leg.
This life jacket is self-inflating
and when it senses water,
إنها سترة نجاة ذاتية 
 النفح، حين تستشعر الماء
Dieser Ring bläst sich automatisch auf,
Este salvavidas se infla solo,
así que cuando siente agua,
Cette ceinture est autogonflante,
Esse colete salva-vidas é auto inflável,
e quando o sensor detecta água,