Module No. 5728
Using the Watch in a Medical Facility or Aircraft
Whenever you are in a hospital, on an aircraft, or in any other location where auto time calibration signal receive or connection with a phone may cause problems, you can perform the procedure below to disable auto time correction. To re-enable auto time correction, perform the same operation again.
-
Press (A).
-
Within 10 seconds after you perform the operation in step 1, pull out the crown to the first click.
-
Rotate the crown to disable auto time correction.
-
Push the crown back in.
The second hand will indicate the last receive result for nine or ten seconds.

If more than 10 seconds elapse before you pull out the crown after you perform the operation in step 1, the second hand will return to indicating seconds. If this happens, perform step 1 again.
[Y(YES)]: Auto time correction enabled
[N(NO)]: Auto time correction disabled

Note
If the watch is paired with a phone, you can use the CASIO WATCHES phone app to disable auto time correction.