At the top of the multi-function dial at the 3 o'clock position is a small tide chart

Moving from right to left, it indicates local tide height based on latitude and the intertidal interval. Since tides vary with local geography, you can calibrate the watch to match your local cycle.What sort of globe-trotting person needs a tide graph? My personal theory is new managers who still surf, sail, or dive. I have a co-worker in exactly that role, and he really likes this Oceanus. Combined with the non-corroding titanium case and 100M water resistance, it can go from surfing to staff meeting and look great both places. At the top of the multi-function dial at the 3 o'clock position is a small tide chart. 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).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. Functional, and simultaneously a nice design accent.The Oceanus 5 Motor Tide Graph is a good looking watch that does a nice job of hiding a ton of high-tech features 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. 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. In other words, if you want to use all the features of this watch, expect to spend some time playing and learning.