Frequent travelers need a watch that is accurate, tough and easy to read in any light, and that is a fair description of the Marathon GSAR. Reference WW194006SS-0113 is the 41mm stainless steel Government Search and Rescue automatic with a black dial and a stainless steel bracelet, a Swiss dive watch that is just as useful at 30,000 feet as at 300 meters.

A few GSAR details are especially handy on the road. The inner 24-hour scale makes military and international time easy to read, and the date at 4:30 keeps your itinerary straight. The 60-minute bezel can time a layover or a parking meter as easily as a dive. And the tritium gas tubes on the markers and hands glow all night, so checking the time on a red-eye flight never requires a button or a backlight.

Underneath, it is a full-spec Marathon diver: brushed 316L steel, sapphire crystal, screw-down crown with guards, 300m water resistance and the Sellita SW200-1 automatic with Incabloc shock protection. The bracelet adds a dressier edge for dinners and meetings at your destination.

Travel-Ready Specs: Marathon GSAR WW194006SS-0113

• Reference: WW194006SS-0113
• Size: 41mm case, 48mm lug to lug, approx. 14mm thick
• Material: brushed 316L stainless steel
• Movement: Swiss automatic, Sellita SW200-1, 26 jewels, ~41-hour reserve
• Water resistance: 300 meters
• Crystal: sapphire
• Dial: black with 24-hour inner scale and date at 4:30
• Lume: tritium tubes on markers and hands
• Bracelet: stainless steel, 20mm

One watch, every time zone, no charging cable required.