Traditionally, the seagoing professionals follows a twice-daily lunar cycle, with the tide coming in on average every 12hrs 25 minutes, before receding again. Created in 1993, the CO 277 calibre beating at the heart of the Admiral’s Cup AC-One 45 Tides was specifically designed for them. This highly exclusive tides movement was developed in collaboration with the Astronomic Observatory of Geneva and the SHOM (Hydrographic and Oceanographic Services of the French National Navy) based in Brest.
In addition to the normal timekeeping functions, the Admiral’s Cup AC-One 45 Tides displays essential navigation-related indications such as lunar cycle and information on high/low tides. This year, the manufacture revisits this timepiece and introduces a new model featuring a light weight titanium case and a stylish ocean blue dial.
The Moon, which determines tidal movements, appears at 12 o’clock. When it is full or black (new moon), meaning when it is aligned the Earth and the Sun, the amplitude or strength of the tides – indicated by a dedicated hand on the dial – is at its peak, with a coefficient of between 95 and 120, dipping to between 20 and 45 during the first and last moon quarters.
The 6 o’clock subdial indicates the time of the two next tides in the next 24-hour period. To know whether the tide is rising or ebbing, the user need only consult the counter at 9 o’clock, which also indicates the current strength. The maximum tide intensity is shown when the pointer is on the horizontal red line. The strength of the current declines when the hand moves towards the high and low tides indicator reaching its lowest strength when the hand can align with the vertical white line.
These remarkably legible subdials are elegantly arranged on a main dial adorned with Corum’s famous and exclusive “split pomegranate” motif, while the iconic nautical pennants on the inner bezel ring lend an elegant overall sense of depth.
The 12 sided Admiral’s Cup case in titanium, which is equally powerful and light weight, features a layered structure with blue PVD-treated titanium inserts echoing the colour of the dial. It houses an authentic SHOM-certified CO 277 calibre which beats at the rate of 28,800 vibrations per hour and has a 42-hour power reserve. It also provides a date display at 3o’clock.The case made in grade 5 titanium has a generous proportion measuring 45 mm diameter. The sapphire back provides the view of the CO 277 movement.
The new Admiral’s Cup Ac-One 45 Tides model is supplied with a vulcanized rubber strap secured by a folding clasp. Clearly built for ocean adventures, this timepiece offers water-resistance up to 300 meters.
Model: Admiral’s Cup Ac-One 45 Tides
Ref. A277/02401 – 277.101.04/F373 AB12
CO 277 Automatic
Power reserve: 42 hours
Frequency: 4 Hz, 28’800 vph
Dimension: 11 1/2”’
Rotor with CORUM dedicated decoration
Skeletonized and circular shaped rotor
Hour & Minute
Moonphase & tides coefficient
Timing of the next two high and low tides
Current strength & tidal process indicator
Hourly nautical pennants transferred on the flange
Applied rhodium coated minute indexes with white superluminova
CORUM logo applied on the dial
“Grenadier fendu” finishing
Hour and minute: Dauphine-variant; Rhodium coated; Faceted; Skeleton; White superluminova
Second: Baton with CORUM key; Rhodium coated
Counters: Dauphine-variant; Rhodium-coated; Faceted
Dimension: 45 mm
Thickness: 14.30 mm
Case material: Titanium grade 5
Bezel material: Titanium grade 5
Case sides: Titanium grade 5
Crown material: Titanium grade 5; Engraved CORUM key
Crown protector material: Titanium grade 5
Crystal: Sapphire crystal with anti-reflective treatment
Back type: Open back cover in titanium grade 5 with glare proof sapphire crystal
Water-resistance: 300 meters / 30 ATM
Material: Vulcanized rubber
Interhorn/Buckle: 23/20 mm
Buckle type: Triple folding clasp
Buckle material: Titanium grade 5; Engraved CORUM logo; Opening and fastening system using 2 pushers