CITIZEN is proud to unveil the new Eco-Drive*1 AQUALAND models, the latest in the renowned PROMASTER MARINE line of dive watches. CITIZEN’s world-renowned PROMASTER brand has long enjoyed the highest regard among dive professionals around the world for its supreme durability and superior functionality. These new PROMASETER diver’s watches offer unmatched toughness and visibility as well as an electronic depth meter that can gauge water depths up to 70 metres.

CITIZEN launched AQUALAND (later renamed “PROMASTER AQUALAND”), the world’s first dive watch to incorporate an electronic depth meter in 1985. For more than 30 years, CITIZEN has continued to build on this achievement, developing various dive watches that incorporate sensor technologies for professional use.

The PROMASTER MARINE category, which epitomizes this proud history, has achieved renown and prominence around the world. The new Eco-Drive PROMASTER AQUALAND models deliver enhancements designed for all types of divers — from recreational to professional. From their cutting-edge specifications to the all-new designs, these diver’s watches have been upgraded for maximum toughness and visibility. All of this makes these new ISO compliant watches perfectly suited for the Expert range of the PROMASTER MARINE line.

Large hands and indicators use a glow-in-the-dark material to ensure superior visibility. The unique shape of the hands also makes it easier to recognize time and depth, even when all the hands converge at the same position. Different colours of luminous paints employed on the time display and depth metres, respectively, make it easier to read the information even under water. Wide distance indexes — ranging from 0 to 40 metres — enable wearers to easily read the indexes while enjoying the dynamic movement of the hands. The shape of the case, which is inspired by a clamshell, enhances the sense of protection. It packs robust functionality in a stylish design, thoroughly safeguarding the watch’s internal mechanisms from accidental damage.

Depth meter (measurement  to 70m)

A new depth meter can show the current depth and maximum depth during each dive simultaneously. Operational range is up to 70 metres below sea level. The starting point for the depth indicator is positioned at 3 o’clock (horizontal level) to make the movement of the indicator simulate diving from the surface to the deep sea. Since 40-metre coverage is standard for most recreational divers, the watch displays distances at wide indexes ranging from 0 to 40 metres. On the other hand, distances between indexes from 50 to 70 metres are set more narrowly. The user can easily read indexes while viewing the dynamic movements of the hands.

•Large hands for excellent visibility

Large hands enable users to read time and depth at a glance. CITIZEN’s intuitive layout design ensures the user can recognise information even when all the hands converge at the same position.

The shape of the water depth hand (featured as blue above) and maximum water depth hand (featured as gray below) have been astutely designed to prevent hiding each other even when they arrive at the same position.
•Colour coding enhances recognition under water

Luminous paint on the hands and indexes is coded green for time display and blue for depth metre, providing easier recognition under water. The depth metre uses blue paint, which is easier to read under water. All luminous paints are made from completely non-radioactive materials. 

•Easy-to-operate bezel

A newly developed corrugated bezel ensures ease of operation even when wearing gloves. A unified bezel and case design prevents operational error even in the event of impact shock. Positioning the crown at the 4 o’clock gives the wearer unobstructed access. (Note: The gold ring positioned at 3 o’clock is the water sensor.)
•Robust dual-structure case

The exterior casing features a clamshell design that protects the inside of the watch. A robust, high-impact case and other reinforced parts further shield the movement. Even in the event the watch impacts a hard surface such as rock while underwater, the reinforced design ensures depth protection and minimises disruption of the movement.

•Thirty years of accumulated experience in sensor technologies enable CITIZEN to achieve an operational range of between 0 and 70 metres. This includes accuracy of ± 1 metre for depth between 0 to 20 metres and ± 2 metres for depth between 20 to 70 metres.
•Features rapid ascent warning alarm.
•Features Eco-Drive, original CITIZEN light-driven technology. To assure greater safety, a power reserve indicator positioned at 9 o’clock makes it possible to confirm power reserves in four levels before diving.
•CITIZEN’s Eco-Drive technology eliminates the need to replace batteries, which removes the requirement to open the case back, thereby enabling superior waterproof properties for a longer period.