A green dial and a green NATO strap turn the Longines HydroConquest GMT L3.790.4.06.2 into the relaxed member of an otherwise technical family. It keeps the full 300-meter dive spec and a true travel complication, but the fabric strap makes it lighter on the wrist and a little more casual in spirit, which suits it well for travel.

The GMT function is the reason to buy it. An extra 24-hour hand tracks a second time zone, so you can follow home time while abroad, or keep tabs on a colleague across the world. Longines has a long history with multi-time-zone watches, and this one runs on the brand’s exclusive L844 GMT caliber. That movement has a silicon balance spring that resists magnetic fields to ten times the ISO 764 standard, plus a 72-hour power reserve.

The sunray green dial glows olive in low light and emerald in the sun. A 41mm case at 12.9mm thick keeps it wearable, and the NATO strap passes under the case so the watch stays put. It is easy to swap onto a bracelet or rubber later if you want a different look.

HydroConquest GMT green on NATO: reference L3.790.4.06.2

• Case: 41mm stainless steel, 12.9mm thick, 21mm lugs
• Bezel: unidirectional with ceramic insert
• Dial: sunray green with Super-LumiNova on hands and markers
• Movement: Longines L844 automatic GMT, silicon balance spring, 72-hour reserve
• Functions: hours, minutes, seconds, date, 24-hour second time zone
• Water resistance: 300 meters, screw-down crown and caseback
• Strap: green NATO-style fabric strap

A dive-ready GMT that wears like a field watch. It is a good companion for anyone who flies often and likes to keep things easygoing.