Abstract
In recent years, highly and multi functional technologies are rapidly brought to the field of wristwatch and have been paid much attention. Citizen has developed highly and multi functional watches applying latest electronics technology and put them into market, mostly sports watch market. To realize the advanced highly and multi functional technologies as well as low power consumption in a watch, we have developed PGM system which carries embedded real-time OS. Cyber Aqualand (Cal.D700) is our first product that realized PGM system on it. Cal.D700 is an advanced product of Hyper Aqualand. It is a dive computer watch communicable with PC using wireless communication system. Furthermore, Cal.D700 carries secondary battery that can be recharged so that it cleared the annoyance for those who dive frequently and have to change the batteries in a short period of time.
