the OCW600TDA-1AV

In other words, if you want to use all the features of this watch, expect to spend some time playing and learning. It's not rocket science, but it's probably a little more complex than the *** face might lead you to expect. The 5 Motor Tide Graph adds a few new features to its predecessor, the OCW600TDA-1AV:Multi-band atomic radio reception.Tide graph.Retrograde day indicator.Optional ion-plated black version (the one reviewed here is the silver-cased version).I really like the idea of removing LCDs from high-tech watches and dressing them up a bit, however there's no getting around the fact that usability tends to suffer. This Oceanus (which I'll call the 5 Motor Tide Graph) is similar to the OCW600TDA-1AV previously reviewed, however the 5 Motor Tide Graph seems a little more geared toward the worldwide business traveler; not only can it receive atomic time calibration signals in the US, but also in Japan, Germany, and England.In a digital watch, for instance, the display more or less tells you what mode you're in, and since it changes accordingly, it keeps you well oriented. On an analog-only watch, however, it's trickier. Some of the mode indications are *** (as when the tide graph is engaged), but some are more subtle and require a bit of experience to get used to.Retrograde day indicator in addition to the date.The solar panel is actually a ring around the dial, in a complimentary shade of silicon-chip blue.Aside from the learning curve, there's quite a lot to like about this watch:The titanium case makes for a very light and comfortable watch that still feels well-made.Scratch-resistant sapphire crystal.Despite all the functions, the dial is still pretty readable.Wonderfully detailed blue and white sub-dial hands.5-band radio reception.100M (330 feet) of water resistance.World time with time zone swapping (easily swap your primary time zone with your secondary time zone, and vice versa).Subtle date at the 4:30 position (nicely unobtrusive, but there when you need it).