Marathon 41mm Black Pilot's Navigator Date Nylon DEFSTAN Watch The Pilot's Navigator with Date (NAV-D) is a navigator that has been modified from the standard issue version. Featuring a high-torque movement and an EOL (end-of-life) indicator, the Navigator is more than just a mere accessory. It is a vital tool for keeping track of time, ensuring that no moment is wasted, and every second is utilized to its fullest potential. With its tritium tubes on the hour markers and hands, legibility is guaranteed in all lighting conditions, and the 12-hour bi-directional bezel ensures precise timekeeping no matter where your journey takes you. Movement: ETA High-Torque FØ6 No of Jewels: 3 Scale Quantity: 2 Scale Range: 1-12 (13-24) Calendar Type: Date Luminous Features: Tritium Gas Tubes and MaraGlo™ Crystal Material: Sapphire Crown Type: Pressure Case Material: High-Impact Composite Fibreshell Bezel Type: Bi-Directional Bezel Scale: 12 Hour Submersibility: 6 ATM Case Diameter: 41mm Case Thickness: 13mm Lug Width: 20mm