Set it once and it will still be right next season. The Marathon Steel Navigator with Date, reference WW194013SS-0101, combines a 41mm 316L steel case with the thermocompensated ETA F06.412 PreciDrive quartz movement, rated to about ten seconds of variation per year.

Ordinary quartz watches can drift by several seconds a week, mostly because temperature changes affect the crystal oscillator. PreciDrive movements measure temperature and correct for it, which is why this SSNAV-D stays so close to true time across hot summers and cold mornings alike. For a pilot's watch, where timing is the whole point, that precision is a real upgrade.

The SSNAV-D descends from the Pilot's Navigator Marathon built with Kelly Air Force Base in 1986, and the steel model returned to the lineup in 2023. It keeps the essentials: a sapphire crystal, a 90-click bi-directional 12-hour bezel for a second time zone, and tritium gas tubes that glow day and night. A screw-down crown gives the 11mm case 10 ATM of water resistance. The matte black dial has no government markings and a discreet date window at 4:30, and the watch is fitted with a black nylon strap for comfortable everyday wear.

SSNAV-D WW194013SS-0101 Specifications

• Reference: WW194013SS-0101
• Case: 41mm 316L stainless steel, 11mm thick
• Movement: ETA F06.412 PreciDrive, thermocompensated Swiss quartz
• Accuracy: approximately ±10 seconds per year
• Water resistance: 10 ATM, screw-down crown
• Crystal: sapphire
• Bezel: bi-directional 12-hour, 90 clicks
• Dial: matte black, NGM, tritium lume, date at 4:30
• Strap: black nylon, 20mm lugs

Precision you can forget about, in a steel case built to last.