| 摘要 |
PROBLEM TO BE SOLVED: To provide an air filling bag and a boat capable of correctly recognizing the state in which internal pressure reaches a predetermined value as air is filled. SOLUTION: The air filling bag 12 is used for at least a part of a boat hull 11. The air filling bag 12 comprises a feed valve 22 for feeding air therein, and a release valve 23 which is released when the internal pressure reaches the predetermined value. A protective sheet 34 is stuck on the discharge side of the release valve 23, and the protective sheet 34 is oscillated to generate alarm sound when the release valve 23 is released.
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