Air Navihawk CA4664-60W Citizen's flight chrono shrinks to 40 mm

What is new about the Promaster Air Navihawk CA4664-60W?

Citizen has made Navihawks for decades, and most of them have been large. The familiar Navihawk A-T, for example, sits at 44 mm or more. This version, which Mr Stateless reported in January 2025 and Citizen announced to US trade press in February 2025, is described by the brand as an "entirely rethought" Navihawk. The headline change is size: the steel case now measures 40 mm, which Citizen says brings the watch to people with smaller wrists.

The rest of the recipe is familiar but tidier. You get a rotating slide-rule bezel for flight calculations, a 1/5 second chronograph that times up to 60 minutes, a 12 and 24 hour display, and a date. The CA4664-60W is the khaki green version, with black sub-dials and a dark grey bezel. Citizen also offers a copper dial (CA4664-60X) and a silver dial (CA4660-61A).

Key specifications

• Case: 40 mm stainless steel, faceted and satin finished
• Movement: Citizen calibre B620, Eco-Drive light-powered quartz
• Crystal: anti-reflective sapphire
• Water resistance: 200 m
• Bracelet: three-link steel with a fold-over clasp and hidden push buttons
• RRP: £399

How big is it, and how will it wear?

At 40 mm across, the Air Navihawk is a mainstream size rather than a statement. That matters more than usual here, because slide-rule chronographs tend to look larger than their numbers. The bezel takes up a lot of visual space, and the knurled crown sits between crown guards on the right of the case, which adds a little width.

Citizen does not publish the thickness or the lug to lug measurement on its product page, so we cannot say how tall it sits. Expect it to wear more like a modern 40 mm sports watch than a slim dress chronograph. The three-link bracelet should help balance the head, and the sharp case facets give it a more finished look than older Navihawks.

What movement does it use, and how accurate is it?

Inside is calibre B620, one of Citizen's Eco-Drive quartz movements. Eco-Drive charges from any light source, natural or artificial, so there is no routine battery change. If you wear it often or leave it near a window, it should simply keep running.

Citizen does not list an accuracy figure or a full-charge power reserve on the CA4664-60W page, so we have left both out. As a quartz chronograph it will be far more accurate day to day than any mechanical watch at this price. There is no radio control or Bluetooth time sync, so you will set it yourself after the clocks change.

How well is it built?

The specification is strong for the money. A sapphire crystal with anti-reflective coating is not a given on quartz chronographs under £400, and 200 m of water resistance puts it on a par with many dive watches. Citizen rates it for swimming and snorkelling. The bracelet uses a push-button fold-over clasp, which is more secure than a basic friction clasp.

Citizen backs the watch with a five year warranty in the UK, according to UK retailers including Beaverbrooks. That is longer than many rivals in this band offer as standard.

Is it good value against its rivals?

At £399, the Air Navihawk sits in a crowded part of the pilot's watch market. The obvious alternative is Bulova's A-15 Pilot automatic, which Bulova lists at $775 in the US. It is 42 mm, has a mechanical movement and a double-domed sapphire crystal, but Bulova rates it only as splash resistant and it has no chronograph.

Against that, the Citizen does more for less: chronograph timing, a working slide rule, serious water resistance and no battery changes. If you specifically want a mechanical movement, the Bulova is the more romantic choice. If you want a pilot's tool watch you can wear every day without thinking about it, the Citizen makes the stronger case.

Owner feedback on this new 40 mm version is still thin, as it has only been on sale since early 2025. Long-term reports on fading, bracelet wear and Eco-Drive behaviour will take time to appear.

What is the catch?

The dial is busy. Between the slide-rule bezel, three sub-dials, the date and a 12 and 24 hour scale, there is a lot of print in a 40 mm space. Shrinking the case means shrinking the slide-rule numerals too, and they will be harder to read than on the bigger Navihawks. If you actually plan to use the slide rule for fuel or speed calculations, try one in a shop first.

The missing figures are also worth noting. With no published thickness, lug to lug or power reserve on Citizen's page, you are buying partly on trust. Finally, khaki green with grey and red accents is a confident look. The silver and copper versions are calmer options at the same 40 mm size.

“The Navihawk finally fits a normal wrist, and it kept the slide rule.”