This manual introduces the basic operation methods of CASIO watches, including how to charge, set time, use alarm clock and other functions
This manual provides step‑by‑step instructions for using the Casio 3216 tide watch. It covers basic operation, time‑format selection, daylight‑saving time, and how to view tide, lunar and world‑time information.
Additional sections describe battery management, solar charging, automatic illumination, and safety warnings. Reference tables list city codes, illumination times for different light levels, and technical specifications of the device. This manual is written in Japanese.
| Power source | Solar cell and rechargeable battery |
|---|---|
| Battery life (typical use) | ≈11 months under normal conditions |