Japanese watchmaker Citizen has once again added to its popular Promaster collection, this time with two new GPS-equipped dive watches. The two models, dubbed Promaster Eco-Drive Satellite Wave GPS Diver 200m, are the world?s watches to combine light-powered timekeeping, GPS satellite capabilities, and a 200-meter depth diving function, according to the brand. All these elements come together to produce a hardy, practical dive watch ready for adventure. The models arrive as a follow-up to the Promaster Nighthawk from this past summer and Promaster Sky, launched in the spring, which received quite a bit of attention for its attention-grabbing dial.

The new models are offered in two colorways, one in black DLC-and-blue, the other in metal-and-green; otherwise, both use the same technologies and overall design scheme. The watches feature large 47-mm x 15.6-mm titanium cases treated with a material called Duratect, which the brand claims helps the already sturdy titanium to become even harder and more resistant to impacts. On the right side of the case is a screw-down crown used to set the time, date, and GPS functionality, while at the 2 and 4 o?clock positions we find pushers that are used not to operate a chronograph, but to set the the watch?s ?dive mode.? The special mode is activated when both pushers are pressed simultaneously, and in this mode, all functions except time display are halted to prevent any erroneous changes to the watch?s setting during dives. The f...