參考資料(2018):ISO-6425.4.1.5 相關內容: 4.1.5 Diving time indicator The watch shall be equipped with a diving time indicator (e.g. rotating bezel, digital display, or other). Such a device shall be protected against inadvertent handling. This device shall allow the reading of the diving time with a resolution of 1 min or better over at least 60 min. "For analogue displays, the markings indicating every 5 min shall be clearly indicated."