Citizen’s newest Promaster divers were built with a fisherman. The Promaster Dive Uncharted Waters trio pairs Citizen’s Eco-Drive dive watch formula with Peter Miller, the three-time World Sailfish Champion behind the Uncharted Waters television series, and the three watches have now reached Citizen’s US store after an October debut in Canada.
Nothing here reinvents the line. All three run the same Eco-Drive calibre E118 behind sapphire crystal, with 200 meters of water resistance and ISO dive compliance. The choice is size and strap: a 44mm watch on rubber at $425, or a 40.6mm watch on a steel bracelet at $450 in two dial colors.
Citizen Promaster Dive BN0251-04L
44mm stainless steel · Eco-Drive calibre E118 · Sapphire crystal · 200M water resistance
Price: $425 at Citizen
Where to buy: Buy at Citizen
One movement, one spec sheet
Eco-Drive is the core of it. The calibre E118 charges from any light source and never asks for a battery swap, which is the ownership pitch of the whole line: wear it, give it light, ignore the movement.
The E118 is also the newer calibre in Citizen’s dive range. It arrived earlier this year across four Promaster Marine divers before landing in this trio, magnetic resistance included, and it drives a simple three-hand layout with a date. No complications, no chronograph, nothing to service beyond seals, and that simplicity is deliberate on a watch built to live on a boat and take spray, sunscreen and fish slime without a second thought.
Citizen rates the trio for swimming, marine sports and scuba. Each dial carries the Diver’s 200 m marking that comes with ISO compliance.
Sapphire does the protecting up front. It’s a clear step up from the mineral glass on Citizen’s established divers a rung down, and it shrugs off the door frames and gear bags that mark up a crystal over a season of use.
Every model wears a silver-tone stainless steel case.
Citizen covers the trio with a five-year limited warranty, and orders through its own store carry 30-day returns.
The 44mm BN0251-04L puts its crown at 4
The BN0251-04L is the biggest watch here and the cheapest. Its 44mm case pairs a light blue sunray dial with a blue polyurethane strap, and the layout breaks from the standard Promaster template in one visible way.
The crown sits at 4 o’clock. The date window follows it there.
Oversized hands and applied markers carry the legibility, with lume across the dial and an easy-grip bezel built for wet hands. Flip it over and the caseback is engraved with a sailfish under the Uncharted Waters name, the branding touch the whole trio shares, right down to the E118 calibre code etched beside it.
The BN0276-54L is the blue one on steel
The 40.6mm models trade the strap for a triple-link stainless bracelet, finished with a safety fold-over clasp and push-button release. The BN0276-54L runs a blue sunray dial under a matching blue bezel.
Its seconds hand is orange. Citizen saves that hit of contrast for this reference alone, and it works every time your eye sweeps the dial.
The date moves back to 3 o’clock on the bracelet pair. At 40.6mm, this is the version for smaller wrists, or for anyone who finds the 44mm case all bezel. The $25 premium over the BN0251 buys the bracelet and the smaller case, nothing mechanical.
Citizen Promaster Dive BN0276-54L
40.6mm stainless steel · Blue sunray dial · Eco-Drive calibre E118 · Sapphire crystal
Price: $450 at Citizen
Where to buy: Buy at Citizen
The BN0270-51E flips the bezel to orange
The second bracelet model keeps the 40.6mm case and changes the palette. A black sunray dial sits under a bright orange unidirectional bezel, the loudest combination in the trio.
Easiest of the three to read at a glance.
Everything else carries over from the blue model: the bracelet, the clasp, the date at 3, the E118, the sapphire. Choosing between the two bracelet watches is a color decision, and Citizen priced them the same so it stays one.
Citizen Promaster Dive BN0270-51E
40.6mm stainless steel · Black sunray dial, orange bezel · Eco-Drive calibre E118 · Sapphire crystal
Price: $450 at Citizen
Where to buy: Buy at Citizen
Peter Miller’s name is on the caseback, not the dial
Miller has fished on camera for years, hosting Uncharted Waters with Peter Miller on Discovery Channel and the World Fishing Network, alongside Bass 2 Billfish, chasing sailfish, tarpon and marlin in front of an audience that knows the difference between a prop and a tool. Three World Sailfish Championship titles sit behind the collaboration, and the tie-in could easily have turned the dial into a billboard.
It didn’t. Citizen kept the branding engraved across the caseback, sailfish and all, where it works as a maker’s mark instead of advertising.
The dials stay clean. No signature, no show logo under the handset, just the standard Promaster layout. The trio ships in Citizen’s Promaster dive tank case.
The BN0150 remains the value route into the line
Readers who want the Promaster formula for less already have an option, and it sits in our November dive watch guide. The BN0150 is the established 44mm Eco-Drive diver, and Amazon sells it at $294.78 against a $450 list price.
The trade is glass. The BN0150 runs mineral crystal where the new trio runs sapphire, and the Uncharted Waters watches add the newer E118 calibre and the engraved caseback. Our guide to the best dive watches in November 2026 puts the BN0150 against the rest of the field, Seiko and Orient included.
Citizen Promaster Dive BN0150
44mm stainless steel · Eco-Drive · Mineral crystal · 200M water resistance
Price: $294.78 $450.00 (save $155.22, 34% off)
Where to buy: Buy on Amazon
Three watches, one spec, two sizes. Pick the 44mm if your diving happens on rubber, the 40.6mm if the watch also has to slide under a cuff, and let the dial settle the rest.
