Casio CPW-100

Old directions

It is an instant reading which does not change even if you move the watch, so doesn’t, like modern counterparts, take a reading every second. It does however have a “navigation”mode which allows you to store up to 5 sets of measurement data in memory, along with the date and time of the measurement. These can be recalled later to trace your progress on a map for example. To aid navigation the outer bezel can be rotated (N mark to line up with indicated N for example).